payment-ready until 2026-10-06
20 monetized HTTP APIs on the x402 protocol — prediction markets (Polymarket, Kalshi), DeFi/crypto data, multi-chain on-chain reads, live weather, real-time web search, and cross-platform prediction-market divergence signals. No API keys or signups: call any route, receive an HTTP 402 with the exact USDC price, sign a payment, retry, get the data back. Payments settle on Base, Polygon, Arbitrum, or Solana.
Pay from $0.001 to $0.05 per request in USDC on Arbitrum One / Base / Polygon / Solana, settled onchain via the x402 protocol, no signup, no API key needed.
measured since 2026-08-16 (start of our harvest window) · $1.02 all-time · settled via coinbase
VERDICT
ranking generation 3solid 88/100 #24 of 331 in Data by measured score
What the score read on this service: status online, 100% uptime 30d, 417ms response p95, x402 compliance 14 of 14, $0.001 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.
The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.
It is a score inside Data, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 331 listings, this one among them. That set is wider than the 331 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.
Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.
ALTERNATIVES IN DATA
Other Data services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).
| SERVICE | BAND | SCORE | UPTIME 30D | VOL 30D |
|---|---|---|---|---|
| SniperX•x402 | strong | 95 | 100% | $298.60 |
| glim.sh | strong | 94 | 100% | $25.67 |
| cn402 | strong | 93 | 100% | $34.87 |
| x402node | strong | 93 | 100% | $34.87 |
| twit.sh | solid | 92 | 100% | $32.22 |
5 of 330 other ranked services in Data · see the whole category
ASSESSMENT
updated 3h agoThe parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.
reliability 100%
- uptime · latest daily rollup
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 417ms
- avg response
- 274ms
- total checks
- 2,777
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
compliance A (14/14)
14 of 14 x402 conformance checks pass. Full checklist below.
price $0.001 to $0.05 (p10 in Data)
- price (min)
- $0.001
- price (max)
- $0.05
- category percentile (min)
- p10 in Data
- category percentile (max)
- p58 in Data
- endpoints / prices
- 20 / 5
- model
- tiered
- stability
- 86%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- 37d
- registrar
- Name.com, Inc.
- hosting
- custom
- domain created
- 2026-08-15
Identity facts, not a risk score.
traction $0.874 30d · 47 buyers
- volume 30d
- $0.874
- buyers 30d
- 47
- settlements 30d
- 320
- measured since
- 2026-08-16 (start of our harvest window)
- last settlement
- 2026-09-28
- top buyer share
- 30% of 30d volume (address, not entity)
- trend 7d vs 30d
- 0.92x the 30d daily rate
- networks
- eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
- volume all-time
- $1.02
- settlements all-time
- 382
- median settlement 30d
- $0.003
- max settlement 30d
- $0.005
- settled via
- coinbase ($0.87, 320 tx)
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share is part of the ranking score: a higher share lowers the traction part of the score, by up to half when one address holds all 30d volume.
CHANGES
10 in 30dPayout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.
changes schema changed 11m ago (10 in 30d)
schema changed · 11m ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x4c934c63C786157Fefd990945b25eA60a0FB0205","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x64cC42B1cE598e3aBcfBB64Df4688521DDBf1f0A","name":"USD Coin","version":"2"}
schema changed · 4h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x2A89407a98A0732b7fD578c4E156B7166540EB5A","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x4c934c63C786157Fefd990945b25eA60a0FB0205","name":"USD Coin","version":"2"}
schema changed · 6h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x93F6601151cCB08F333AB4B1CCcfb1e188c0bE44","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x2A89407a98A0732b7fD578c4E156B7166540EB5A","name":"USD Coin","version":"2"}
schema changed · 12h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x42dd53906B49c202E8E934b059dc019E04634b00","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x93F6601151cCB08F333AB4B1CCcfb1e188c0bE44","name":"USD Coin","version":"2"}
schema changed · 15h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x59B7Ebc67a3d627FABAF06768c818638452Ae704","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x42dd53906B49c202E8E934b059dc019E04634b00","name":"USD Coin","version":"2"}
schema changed · 17h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x625d8a65134079f8faAAc39a7947c73d93C6aC39","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x59B7Ebc67a3d627FABAF06768c818638452Ae704","name":"USD Coin","version":"2"}
schema changed · 19h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x68EFaFE862d89cE66dd3D7B07d5A3747A0871164","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x625d8a65134079f8faAAc39a7947c73d93C6aC39","name":"USD Coin","version":"2"}
schema changed · 20h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x59B7Ebc67a3d627FABAF06768c818638452Ae704","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x68EFaFE862d89cE66dd3D7B07d5A3747A0871164","name":"USD Coin","version":"2"}
schema changed · 22h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x2A89407a98A0732b7fD578c4E156B7166540EB5A","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x59B7Ebc67a3d627FABAF06768c818638452Ae704","name":"USD Coin","version":"2"}
schema changed · 22h ago
schema removed GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0xE74817F4cDC15844314812B2271276E64e890fAE","name":"USD Coin","version":"2"}
schema added GET /api/generate upto eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"assetTransferMethod":"permit2","facilitatorAddress":"0x2A89407a98A0732b7fD578c4E156B7166540EB5A","name":"USD Coin","version":"2"}
WHAT IT DOES
ai-derivedNo AI synthesis has been produced for this service yet.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| GET | /api/crypto-market | $0.002 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/crypto-price | $0.001 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/crypto-trending | $0.001 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/defi-chains | $0.002 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/defi-tvl | $0.003 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/ens-resolve | $0.002 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/gas-price | $0.001 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/generate | $0.05 | Base | USDC | header | |
| GET | /api/insights | $0.001 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/kalshi-market | $0.002 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/kalshi-markets | $0.003 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/ping | $0.001 | Base | USDC | header | |
| GET | /api/polymarket-market | $0.002 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/polymarket-markets | $0.003 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/prediction-arb | $0.005 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/rpc | $0.003 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/wallet-balance | $0.002 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/weather | $0.001 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /api/web-search | $0.003 | Arbitrum One/Base/Polygon/Solana | USDC | header | |
| GET | /protected | $0.001 | Arbitrum One/Base/Polygon/Solana | USDC | header |
20 endpoints
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /api/crypto-market returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
// request
curl -i 'https://x402tap.com/api/crypto-market'
// 402 response (captured by monitor) · 20 payloads · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/protected",
"tags": [
"demo",
"content"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "text/html",
"description": "Premium content",
"serviceName": "x402 Protected Content"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"message": "Payment verified — protected HTML content unlocked."
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
"offers": [
{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652850,
"resourceUrl": "https://x402tap.com/protected"
},
"signature": "0x2aaefa68399747896bad7c29d39385e0e10fd38935d1b010609b8fe2ab02b8d54b5399fcbb36cdff6673a4d2420d8e7fd5024532ed55f314d19cd5c24e7ee3a71c",
"acceptIndex": 0
},
{
"format": "eip712",
"payload": {
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:137",
"version": 1,
"validUntil": 1790652850,
"resourceUrl": "https://x402tap.com/protected"
},
"signature": "0xb5c9386b43a40b907cf86655d95eb17fcf335d876306f34fb25f6b077e13793861a40d81e65394575052f1622a869585d9ba1ce3367e10f24e5803f175024ad11b",
"acceptIndex": 1
},
{
"format": "eip712",
"payload": {
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:42161",
"version": 1,
"validUntil": 1790652850,
"resourceUrl": "https://x402tap.com/protected"
},
"signature": "0x11eb2863472947d86cebd7a2b3f98115441e3b7820aee334c910f50d0ebb7fb97c917cc5b65e221924ba3b438db10195b657d57e563c02ede2c8739a87ba07071c",
"acceptIndex": 2
},
{
"format": "eip712",
"payload": {
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"version": 1,
"validUntil": 1790652850,
"resourceUrl": "https://x402tap.com/protected"
},
"signature": "0x5a478fb8240fe08152afc5ebf32f0c5d312a8406851c576356aacb7af3d4f1ba58b2c04bb50a46bb5ff4caf862fe79e0a349a276514f0944028d4b3a6aa09e1e1c",
"acceptIndex": 3
}
]
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"offers"
],
"properties": {
"offers": {
"type": "array",
"items": {
"type": "object",
"required": [
"format",
"signature"
],
"properties": {
"format": {
"type": "string"
},
"payload": {
"type": "object",
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"properties": {
"asset": {
"type": "string"
},
"payTo": {
"type": "string"
},
"amount": {
"type": "string"
},
"scheme": {
"type": "string"
},
"network": {
"type": "string"
},
"version": {
"type": "integer"
},
"validUntil": {
"type": "integer"
},
"resourceUrl": {
"type": "string"
}
}
},
"signature": {
"type": "string"
},
"acceptIndex": {
"type": "integer"
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/insights",
"tags": [
"insights",
"trends",
"analytics",
"data",
"tiered-pricing",
"wikipedia"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Trend insights for a topic, based on real Wikipedia page-view volume and momentum. Premium tier adds relatedTrends: other Wikipedia article titles matching the same search terms (title-similarity, not a curated semantic-relevance ranking). Not literal search/social trend data — see the response's `source` field.",
"serviceName": "x402 Trend Insights"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"tier": "premium",
"topic": "bitcoin"
}
},
"output": {
"type": "json",
"example": {
"tier": "premium",
"score": 62,
"topic": "bitcoin",
"source": "Wikipedia pageviews for \"Bitcoin\"",
"momentum": "-8% WoW",
"relatedTrends": [
"Bitcoin protocol",
"Bitcoin in El Salvador",
"Bitcoin Cash"
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
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"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"topic"
],
"properties": {
"tier": {
"enum": [
"standard",
"premium"
],
"type": "string",
"description": "standard = $0.001, premium = $0.005"
},
"topic": {
"type": "string",
"description": "Topic to fetch trend insights for"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
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{
"format": "eip712",
"payload": {
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"network": "eip155:8453",
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{
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"payload": {
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"schema": {
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"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
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"properties": {
"offers": {
"type": "array",
"items": {
"type": "object",
"required": [
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"signature"
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"properties": {
"format": {
"type": "string"
},
"payload": {
"type": "object",
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
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"properties": {
"asset": {
"type": "string"
},
"payTo": {
"type": "string"
},
"amount": {
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},
"scheme": {
"type": "string"
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"network": {
"type": "string"
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"version": {
"type": "integer"
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"validUntil": {
"type": "integer"
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"resourceUrl": {
"type": "string"
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}
},
"signature": {
"type": "string"
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"acceptIndex": {
"type": "integer"
}
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}
}
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}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "3000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "3000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "3000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/kalshi-markets",
"tags": [
"prediction-markets",
"kalshi",
"finance",
"trading",
"events"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Search or list open Kalshi prediction markets (regulated US event contracts)",
"serviceName": "x402 Kalshi Markets"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "fed rate",
"limit": "5"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"query": "fed rate",
"markets": [
{
"title": "Example Kalshi market?",
"status": "active",
"ticker": "KXEXAMPLE-99",
"yesAsk": 0.12,
"yesBid": 0.1,
"closeTime": "2099-08-01T04:59:00Z",
"lastPrice": 0.12,
"liquidity": 0,
"volume24h": 174.62,
"eventTicker": "KXEXAMPLE-99"
}
]
}
}
},
"schema": {
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"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
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],
"properties": {
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"required": [
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"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
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"properties": {
"q": {
"type": "string",
"description": "Optional keyword filter on the market title"
},
"limit": {
"type": "string",
"description": "Max markets to return, 1-50 (default 10)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
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{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
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"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652850,
"resourceUrl": "https://x402tap.com/api/kalshi-markets"
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"network": "eip155:137",
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"resourceUrl": "https://x402tap.com/api/kalshi-markets"
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{
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"network": "eip155:42161",
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"validUntil": 1790652850,
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"acceptIndex": 2
},
{
"format": "eip712",
"payload": {
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"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
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"schema": {
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"required": [
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"properties": {
"offers": {
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"items": {
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"required": [
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"signature"
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"properties": {
"format": {
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"payload": {
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"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
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"properties": {
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},
"payTo": {
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},
"amount": {
"type": "string"
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"scheme": {
"type": "string"
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"network": {
"type": "string"
},
"version": {
"type": "integer"
},
"validUntil": {
"type": "integer"
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"resourceUrl": {
"type": "string"
}
}
},
"signature": {
"type": "string"
},
"acceptIndex": {
"type": "integer"
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
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"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
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{
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
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"maxTimeoutSeconds": 300
},
{
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
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"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
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"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/weather",
"tags": [
"weather",
"forecast",
"api",
"data",
"live"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Live current weather conditions for any city, sourced from Open-Meteo",
"serviceName": "x402 Weather API"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"city": "Austin"
}
},
"output": {
"type": "json",
"example": {
"report": {
"weather": "partly cloudy",
"windMph": 7,
"feelsLike": 94,
"temperature": 91,
"humidityPercent": 48
},
"source": "open-meteo.com",
"location": "Austin, Texas, United States",
"observedAt": "2026-08-15T12:00"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
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],
"properties": {
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"required": [
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"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"city": {
"type": "string",
"description": "City name to fetch live current weather for (defaults to New York)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
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{
"format": "eip712",
"payload": {
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"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652850,
"resourceUrl": "https://x402tap.com/api/weather"
},
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{
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{
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},
{
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"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
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"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"version": 1,
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},
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"schema": {
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"required": [
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"properties": {
"offers": {
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"items": {
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"required": [
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"signature"
],
"properties": {
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},
"payload": {
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"required": [
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"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"properties": {
"asset": {
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},
"payTo": {
"type": "string"
},
"amount": {
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},
"scheme": {
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"network": {
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"version": {
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"validUntil": {
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},
"signature": {
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},
"acceptIndex": {
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}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"facilitatorAddress": "0x64cC42B1cE598e3aBcfBB64Df4688521DDBf1f0A",
"assetTransferMethod": "permit2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "50000",
"scheme": "upto",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/generate",
"tags": [
"ai",
"text-generation",
"llm",
"content",
"usage-based"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Real LLM-backed text generation (Gemini), billed by output length (max $0.05/request)",
"serviceName": "x402 Text Generator"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"prompt": "tell me something interesting"
}
},
"output": {
"type": "json",
"example": {
"text": "Octopuses have three hearts and blue, copper-based blood instead of iron-based hemoglobin.",
"prompt": "tell me something interesting",
"billedCharacters": 92
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"prompt"
],
"properties": {
"prompt": {
"type": "string",
"description": "Text prompt to generate a response for"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
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{
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"resourceUrl",
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"network",
"asset",
"payTo",
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},
"payTo": {
"type": "string"
},
"amount": {
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},
"scheme": {
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},
"network": {
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},
"version": {
"type": "integer"
},
"validUntil": {
"type": "integer"
},
"resourceUrl": {
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"signature": {
"type": "string"
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"acceptIndex": {
"type": "integer"
}
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},
{
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"name": "USD Coin",
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{
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{
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},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
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"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
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"tags": [
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"ethereum",
"on-chain",
"blockchain",
"fees"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
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},
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"info": {
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"method": "GET",
"queryParams": {
"chain": "base"
}
},
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"gasPriceGwei": 0.012,
"nativeSymbol": "ETH",
"maxFeePerGasGwei": 0.015,
"maxPriorityFeePerGasGwei": 0.001
}
}
},
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"$schema": "https://json-schema.org/draft/2020-12/schema",
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"properties": {
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},
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],
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},
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},
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},
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"properties": {
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},
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"type": "object"
}
}
}
}
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},
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{
"format": "eip712",
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"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
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"network",
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"payTo": {
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"amount": {
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"scheme": {
"type": "string"
},
"network": {
"type": "string"
},
"version": {
"type": "integer"
},
"validUntil": {
"type": "integer"
},
"resourceUrl": {
"type": "string"
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},
"signature": {
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"acceptIndex": {
"type": "integer"
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
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"name": "USD Coin",
"version": "2"
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
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"version": "2"
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
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"network": "eip155:137",
"maxTimeoutSeconds": 300
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{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
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},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/crypto-trending",
"tags": [
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"trending",
"market-data",
"finance"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Get the top trending cryptocurrencies right now, ranked by search interest",
"serviceName": "x402 Crypto Trending"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
},
"output": {
"type": "json",
"example": {
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{
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"name": "Pepe",
"symbol": "PEPE",
"priceUsd": 0.0000091,
"marketCap": "$3.8B",
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"change24hPct": 5.3,
"marketCapRank": 28
}
],
"count": 1
}
}
},
"schema": {
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"required": [
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],
"properties": {
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],
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"const": "http"
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"method": {
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],
"type": "string"
},
"queryParams": {
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"properties": {}
}
},
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},
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"properties": {
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"type": "string"
},
"example": {
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}
}
}
}
}
},
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{
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"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
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"network": "eip155:8453",
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"resourceUrl": "https://x402tap.com/api/crypto-trending"
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{
"format": "eip712",
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"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/crypto-trending"
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{
"format": "eip712",
"payload": {
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
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"network": "eip155:42161",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/crypto-trending"
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{
"format": "eip712",
"payload": {
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"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/crypto-trending"
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"required": [
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"scheme": {
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"network": {
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"version": {
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"validUntil": {
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}
},
"signature": {
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}
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}
},
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},
{
"error": "Payment required",
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{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
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"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
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"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
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"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
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},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
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"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
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"tags": [
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"kalshi",
"finance",
"trading",
"events"
],
"iconUrl": "https://x402tap.com/icon.png",
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},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"ticker": "KXELONMARS-99"
}
},
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"noBid": 0.88,
"title": "Will Elon Musk visit Mars before Aug 1, 2099?",
"result": null,
"status": "active",
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"volume": 117134.08,
"yesAsk": 0.12,
"yesBid": 0.1,
"openTime": "2025-08-28T20:45:00Z",
"closeTime": "2099-08-01T04:59:00Z",
"lastPrice": 0.12,
"liquidity": 0,
"volume24h": 174.62,
"noSubTitle": "Mars",
"eventTicker": "KXELONMARS-99",
"yesSubTitle": null
}
}
},
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"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"ticker"
],
"properties": {
"ticker": {
"type": "string",
"description": "Kalshi market ticker (from /api/kalshi-markets)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
"offers": [
{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/kalshi-market"
},
"signature": "0x45f82743a97946b2e8d30f74b2801717886690a61e69630b7c569b403a22a33d455a7af557e24cbc4a731b2c70a33f16ebe7e468ae336552da2badd878045bed1c",
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{
"format": "eip712",
"payload": {
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:137",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/kalshi-market"
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{
"format": "eip712",
"payload": {
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/kalshi-market"
},
"signature": "0xdd3e55d4e405cf7ec3936f211dc30757925ea658645484d1e08114126e653281351fdf09c5199f0fd0708151dd2409539412a9d78f2610e208ca0206ffe62a0a1c",
"acceptIndex": 2
},
{
"format": "eip712",
"payload": {
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/kalshi-market"
},
"signature": "0x59ee2e22d8229c8d8cc7c3fa730bb49c5c3f23ec33c8597852ae57df8490fdcc6ccfb8abc9acb7c118d2204cd8787bbd198a652f31fec89e7a813db6fd8360ae1b",
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"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"offers"
],
"properties": {
"offers": {
"type": "array",
"items": {
"type": "object",
"required": [
"format",
"signature"
],
"properties": {
"format": {
"type": "string"
},
"payload": {
"type": "object",
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"properties": {
"asset": {
"type": "string"
},
"payTo": {
"type": "string"
},
"amount": {
"type": "string"
},
"scheme": {
"type": "string"
},
"network": {
"type": "string"
},
"version": {
"type": "integer"
},
"validUntil": {
"type": "integer"
},
"resourceUrl": {
"type": "string"
}
}
},
"signature": {
"type": "string"
},
"acceptIndex": {
"type": "integer"
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/wallet-balance",
"tags": [
"wallet",
"balance",
"ethereum",
"on-chain",
"blockchain",
"erc20"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Native and (optional) ERC-20 token balance for a wallet address across major EVM chains (base, ethereum, polygon, arbitrum, optimism)",
"serviceName": "x402 Wallet Balance Lookup"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "base",
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}
},
"output": {
"type": "json",
"example": {
"chain": "Base",
"token": {
"symbol": "USDC",
"address": "0x8335...",
"balance": "500.0",
"decimals": 6
},
"native": {
"symbol": "ETH",
"balance": "1.24031"
},
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
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"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"address"
],
"properties": {
"chain": {
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"description": "Chain to query: base, ethereum, polygon, arbitrum, optimism (default base)"
},
"token": {
"type": "string",
"description": "Optional ERC-20 token contract address to also check"
},
"address": {
"type": "string",
"description": "EVM wallet address (0x...)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
"offers": [
{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/wallet-balance"
},
"signature": "0x3d6dd59003f59832216ca083de8f6d017f61324bad4ae9efd18c9e78644d418a48bbba8bed3af30113d4489861f2644516f4fb2ef035fa5159154b8ba787c1901b",
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{
"format": "eip712",
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:137",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/wallet-balance"
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"signature": "0x81fb01c8952b2529f657bcdf082ef80eaef48e3eb5c62bd6baf8d569642ae5cb00f22513695363accf5983282c10d1b0337cd7aace5c55be4061d32eaa48b0871b",
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{
"format": "eip712",
"payload": {
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/wallet-balance"
},
"signature": "0xb6c6a5a11d859a8ad59fe763eec69090ecf4f9eebf7e53fb9de3b55ead29b3fc4920294a361c037ab44b73f7ea11f307a81eb2f31720d1fb6440ebeff4661ec61b",
"acceptIndex": 2
},
{
"format": "eip712",
"payload": {
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/wallet-balance"
},
"signature": "0x11268a4c692a2fa5cad31bba5fa27827bf9fe26059d3b08fe991aed6a3095cf242419d658c754eea71a84ad8aea82f9cc04390a5b11af4c07ec665bdaea208c91b",
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},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"offers"
],
"properties": {
"offers": {
"type": "array",
"items": {
"type": "object",
"required": [
"format",
"signature"
],
"properties": {
"format": {
"type": "string"
},
"payload": {
"type": "object",
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"properties": {
"asset": {
"type": "string"
},
"payTo": {
"type": "string"
},
"amount": {
"type": "string"
},
"scheme": {
"type": "string"
},
"network": {
"type": "string"
},
"version": {
"type": "integer"
},
"validUntil": {
"type": "integer"
},
"resourceUrl": {
"type": "string"
}
}
},
"signature": {
"type": "string"
},
"acceptIndex": {
"type": "integer"
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/polymarket-market",
"tags": [
"prediction-markets",
"polymarket",
"crypto",
"finance",
"trading"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Get full detail (prices, volume, liquidity, resolution) for a single Polymarket market by slug",
"serviceName": "x402 Polymarket Market Detail"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"slug": "xi-jinping-out-before-2027"
}
},
"output": {
"type": "json",
"example": {
"slug": "xi-jinping-out-before-2027",
"active": true,
"closed": false,
"endDate": "2026-12-31T00:00:00Z",
"outcomes": [
"Yes",
"No"
],
"question": "Xi Jinping out before 2027?",
"liquidity": 233436.44,
"volume1wk": 122625.33,
"volume24hr": 23665.67,
"description": "This market will resolve to \"Yes\" if...",
"volumeTotal": 12084934.95,
"outcomePrices": [
0.0445,
0.9555
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"slug"
],
"properties": {
"slug": {
"type": "string",
"description": "Polymarket market slug (from the URL or /api/polymarket-markets)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
"offers": [
{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/polymarket-market"
},
"signature": "0xafea45a4cc2332487d56c9f30bb4be2ec715158bd322f2c09b3e94575c11835d4db003e5cd4f43a44fea2c5278f7b092d62bb73b5dae053a5b695d8d9f76a5bc1c",
"acceptIndex": 0
},
{
"format": "eip712",
"payload": {
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:137",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/polymarket-market"
},
"signature": "0x707b47c609249c032f8486e13d6d1dbee241887429f0c699fc296e8f480c3ed9783e2c4d034b5dfd2459ea9ea31e9727f90f9d37bf85aeccb732df3c960d86e31b",
"acceptIndex": 1
},
{
"format": "eip712",
"payload": {
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/polymarket-market"
},
"signature": "0x9558341402b8f375cad1dd2e463f868ff9c206912caca878c3f5147c4acfb5f626009884d45df009cbecdf77e778d0b6e1139d640e08e840f007c74aba56e0471c",
"acceptIndex": 2
},
{
"format": "eip712",
"payload": {
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"version": 1,
"validUntil": 1790652851,
"resourceUrl": "https://x402tap.com/api/polymarket-market"
},
"signature": "0x4e86324fe9d138602300dc38908f5c9a7c4de8ca5ce1289a55bba1a9bac3e4cf3e730ba6014b428e3aeebe66ae943903d86bd48233103af1867de7d6969b6fdc1c",
"acceptIndex": 3
}
]
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"offers"
],
"properties": {
"offers": {
"type": "array",
"items": {
"type": "object",
"required": [
"format",
"signature"
],
"properties": {
"format": {
"type": "string"
},
"payload": {
"type": "object",
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"properties": {
"asset": {
"type": "string"
},
"payTo": {
"type": "string"
},
"amount": {
"type": "string"
},
"scheme": {
"type": "string"
},
"network": {
"type": "string"
},
"version": {
"type": "integer"
},
"validUntil": {
"type": "integer"
},
"resourceUrl": {
"type": "string"
}
}
},
"signature": {
"type": "string"
},
"acceptIndex": {
"type": "integer"
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/ens-resolve",
"tags": [
"ens",
"ethereum",
"on-chain",
"identity",
"domains"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Resolve an ENS name to an address, or reverse-resolve an address to its primary ENS name",
"serviceName": "x402 ENS Resolver"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"name": "vitalik.eth"
}
},
"output": {
"type": "json",
"example": {
"name": "vitalik.eth",
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"name": {
"type": "string",
"description": "ENS name to resolve, e.g. \"vitalik.eth\""
},
"address": {
"type": "string",
"description": "EVM address to reverse-resolve to its primary ENS name"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
"offers": [
{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
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],
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},
"extensions": {
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"method": "GET",
"queryParams": {
"vs": "usd",
"ids": "bitcoin,ethereum,solana"
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},
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},
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],
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},
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"required": [
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],
"properties": {
"vs": {
"type": "string",
"description": "Quote currency, e.g. \"usd\", \"eur\" (default usd)"
},
"ids": {
"type": "string",
"description": "Comma-separated CoinGecko coin ids, e.g. \"bitcoin,ethereum\""
}
}
}
},
"additionalProperties": false
},
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"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
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{
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{
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"validUntil": 1790652853,
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"payTo": {
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"amount": {
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"scheme": {
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"network": {
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"version": {
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"validUntil": {
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"resourceUrl": {
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}
}
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}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
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"name": "USD Coin",
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{
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"name": "USD Coin",
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"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
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"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
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"tags": [
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"market-data",
"finance",
"trading"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Rich market data for one or more cryptocurrencies: rank, 24h high/low, volume, ATH, and more",
"serviceName": "x402 Crypto Market Data"
},
"extensions": {
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"method": "GET",
"queryParams": {
"vs": "usd",
"ids": "bitcoin,ethereum"
}
},
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"example": {
"vs": "usd",
"coins": [
{
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"name": "Bitcoin",
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"low24h": 61890,
"symbol": "btc",
"high24h": 63980,
"athPrice": 108786,
"marketCap": 1267177736333,
"volume24h": 28123456789,
"athChangePct": -41.9,
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"circulatingSupply": 19780000
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"properties": {
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},
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],
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"type": "object",
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"properties": {
"vs": {
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"type": "string",
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}
}
}
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},
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],
"properties": {
"type": {
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},
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}
}
}
}
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{
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"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
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"network": "eip155:8453",
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"validUntil": 1790652853,
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"resourceUrl": "https://x402tap.com/api/crypto-market"
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{
"format": "eip712",
"payload": {
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
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"network": "eip155:42161",
"version": 1,
"validUntil": 1790652853,
"resourceUrl": "https://x402tap.com/api/crypto-market"
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{
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"payload": {
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
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"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
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"amount": {
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},
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{
"error": "Payment required",
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{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
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{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
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"name": "USD Coin",
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"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
"amount": "5000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/prediction-arb",
"tags": [
"prediction-markets",
"polymarket",
"kalshi",
"arbitrage",
"crypto",
"finance",
"trading"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Find prediction-market questions priced differently on Polymarket vs. Kalshi — a cross-platform divergence signal built from data no single-platform competitor has",
"serviceName": "x402 Prediction Market Divergence"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": "5",
"minDivergencePct": "10"
}
},
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"count": 1,
"query": null,
"matches": [
{
"kalshi": {
"title": "Fed cuts rates at September FOMC meeting?",
"ticker": "KXFED-99",
"subTitle": null,
"yesProbability": 0.496
},
"matchScore": 0.5,
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"question": "Will the Fed cut rates in September?",
"volume24hr": 45678.9,
"yesProbability": 0.62
},
"cheaperYesOn": "kalshi",
"divergencePct": 12.4
}
],
"minDivergencePct": 10
}
}
},
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"required": [
"input"
],
"properties": {
"input": {
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"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
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"properties": {
"q": {
"type": "string",
"description": "Optional keyword filter on the matched question text"
},
"limit": {
"type": "string",
"description": "Max matches to return, 1-25 (default 10)"
},
"minDivergencePct": {
"type": "string",
"description": "Minimum probability-point divergence to include, 0-100 (default 5)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
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{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
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"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652853,
"resourceUrl": "https://x402tap.com/api/prediction-arb"
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{
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{
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"version": 1,
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"resourceUrl": "https://x402tap.com/api/prediction-arb"
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{
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"payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
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"version": 1,
"validUntil": 1790652853,
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"required": [
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"payload": {
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"scheme",
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"amount"
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"payTo": {
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"amount": {
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},
"scheme": {
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"network": {
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},
"version": {
"type": "integer"
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"validUntil": {
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},
"signature": {
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"acceptIndex": {
"type": "integer"
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
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{
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"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
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{
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"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
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"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "3000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
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"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
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"tags": [
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"polymarket",
"crypto",
"finance",
"trading"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Search or list active Polymarket prediction markets, ranked by 24h volume",
"serviceName": "x402 Polymarket Markets"
},
"extensions": {
"bazaar": {
"info": {
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"type": "http",
"method": "GET",
"queryParams": {
"q": "election",
"limit": "5"
}
},
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"example": {
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"query": "election",
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"active": true,
"endDate": "2026-12-31T00:00:00Z",
"outcomes": [
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"No"
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"question": "Example prediction market?",
"liquidity": 45678.9,
"volume24hr": 12345.67,
"volumeTotal": 987654.32,
"outcomePrices": [
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0.38
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}
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}
}
},
"additionalProperties": false
},
"output": {
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],
"properties": {
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},
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}
}
}
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},
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{
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"network": "eip155:42161",
"maxTimeoutSeconds": 300
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{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
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"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
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],
"resource": {
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"tags": [
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"crypto",
"tvl",
"finance",
"on-chain",
"blockchain"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
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"serviceName": "x402 DeFi Chain TVL Ranking"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": "5"
}
},
"output": {
"type": "json",
"example": {
"count": 2,
"chains": [
{
"rank": 1,
"chain": "Ethereum",
"tvlUsd": 65000000000,
"tokenSymbol": "ETH"
},
{
"rank": 2,
"chain": "Solana",
"tvlUsd": 8500000000,
"tokenSymbol": "SOL"
}
]
}
}
},
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"method": {
"enum": [
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],
"type": "string"
},
"queryParams": {
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"properties": {
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}
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"additionalProperties": false
},
"output": {
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"required": [
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],
"properties": {
"type": {
"type": "string"
},
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}
}
}
}
}
},
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{
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],
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"tags": [
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"tvl",
"finance",
"on-chain"
],
"iconUrl": "https://x402tap.com/icon.png",
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"extensions": {
"bazaar": {
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"method": "GET",
"queryParams": {
"protocol": "uniswap"
}
},
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"asOf": "2026-08-16T00:00:00.000Z",
"name": "Uniswap",
"chains": [
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"Base",
"Arbitrum"
],
"symbol": "UNI",
"tvlUsd": 2922032778,
"tvlByChain": {
"Base": 400000000,
"Ethereum": 1800000000
},
"marketCapUsd": 5200000000
}
}
},
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"properties": {
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"const": "http"
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"type": "string"
},
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"required": [
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],
"properties": {
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"type": "string",
"description": "DefiLlama protocol slug, e.g. \"uniswap\", \"aave\""
}
}
}
},
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},
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}
}
}
}
}
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"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652853,
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{
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{
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},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"withdrawDelay": 3600,
"receiverAuthorizer": "0xFA9dFa6C94285bdb52aDeFF9d88CC7882911a02b"
},
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "batch-settlement",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402tap.com/api/ping",
"tags": [
"heartbeat",
"monitoring",
"micropayments",
"batch-settlement"
],
"iconUrl": "https://x402tap.com/icon.png",
"mimeType": "application/json",
"description": "Heartbeat endpoint billed via a batch-settlement payment channel",
"serviceName": "x402 Heartbeat"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"ts": 1700000000000,
"pong": true
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
"offers": [
{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652853,
"resourceUrl": "https://x402tap.com/api/ping"
},
"signature": "0xd9be2e0839bafe6a498ccd2a91bfa1f8aaf5a9ef46239e1a84f50834199dd30315b50ca6250c2c9fd76b2563529b00637128d3ceb9c146d2c1bd33da9b0cbe4e1b",
"acceptIndex": 0
},
{
"format": "eip712",
"payload": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
"amount": "1000",
"scheme": "batch-settlement",
"network": "eip155:8453",
"version": 1,
"validUntil": 1790652853,
"resourceUrl": "https://x402tap.com/api/ping"
},
"signature": "0x704b2c5bdc63c4b682cd4b7a58bce8c91a908ae9ad7a14592a1dc81455b713bf22a5995a55ab85d030146b4032d2883df8cfaaee50bd5ffcf4e3d34b71b9e0571b",
"acceptIndex": 1
}
]
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"offers"
],
"properties": {
"offers": {
"type": "array",
"items": {
"type": "object",
"required": [
"format",
"signature"
],
"properties": {
"format": {
"type": "string"
},
"payload": {
"type": "object",
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"properties": {
"asset": {
"type": "string"
},
"payTo": {
"type": "string"
},
"amount": {
"type": "string"
},
"scheme": {
"type": "string"
},
"network": {
"type": "string"
},
"version": {
"type": "integer"
},
"validUntil": {
"type": "integer"
},
"resourceUrl": {
"type": "string"
}
}
},
"signature": {
"type": "string"
},
"acceptIndex": {
"type": "integer"
}
}
}
}
}
}
}
},
"x402Version": 2
}
] OVER TIME
All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/x402tap/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
UPTIME
30D UPTIME 100%
RESPONSE TIME
AVG RESP 268ms
PRICE (captured 402, USD)
Median across 20 endpoints. Use the selector to isolate one.
SUB-SCORES (uptime + x402 compliance)
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
PILLARS OVER TIME (measured)
price percentile in Data
site signals present (of 6)
Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.
VOLUME (on-chain settlement, USD)
DISTINCT BUYERS
COMPLIANCE
14/14 checks pass · grade Alast 402 captured 2026-09-29 · last up 2026-09-29
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
SITE PILLARS
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
● OK 231ms
● OK 229ms
● OK 303ms
● OK 278ms
● OK 346ms
● OK 295ms
● OK 284ms
● OK 249ms
● OK 321ms
● OK 263ms
● OK 283ms
● OK 304ms
● OK 196ms
● OK 232ms
● OK 319ms
● OK 343ms
● OK 288ms
● OK 337ms
EMBED THIS BADGE
// HTML
<a href="https://x402-list.com/services/x402tap?utm_source=badge&utm_medium=referral&utm_campaign=embed"> <img src="https://x402-list.com/badge/x402tap.svg" alt="MicroTap listed on x402-list" height="28"> </a>
// Markdown
[](https://x402-list.com/services/x402tap?utm_source=badge&utm_medium=referral&utm_campaign=embed)
// HTML · live uptime variant
<a href="https://x402-list.com/services/x402tap?utm_source=badge&utm_medium=referral&utm_campaign=embed"> <img src="https://x402-list.com/badge/x402tap.svg?data=uptime" alt="MicroTap uptime on x402-list" height="28"> </a>