payment-ready until 2026-08-20
Paid market-data API for AI agents (x402, USDC on Base): cross-venue perpetual funding rates (OKX, Kraken Futures, dYdX) with a ready-to-use arbitrage spread signal, outlier-cleaned DeFi yields from DefiLlama, and a low-cost BTC/ETH/SOL market snapshot with Fear & Greed index. Clean JSON, exact scheme, from $0.002 per request. OpenAPI at /openapi.json.
Pay from $0.002 to $0.01 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.
first settlement 2026-07-17 · $0.71 all-time · settled via coinbase, payAI
ASSESSMENT
updated 4h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 651ms
- avg response
- 281ms
- total checks
- 2,427
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 $0.002 to $0.01 (p21 in Data)
- price (min)
- $0.002
- price (max)
- $0.01
- category percentile (min)
- p21 in Data
- category percentile (max)
- p24 in Data
- endpoints / prices
- 3 / 3
- model
- tiered
- stability
- 100%
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
- 22d
- registrar
- RegistryGate GmbH
- hosting
- custom
- domain created
- 2026-07-16
Identity facts, not a risk score.
traction $0.7195 30d · 11 buyers
- volume 30d
- $0.7195
- buyers 30d
- 11
- settlements 30d
- 34
- first settlement
- 2026-07-17
- last settlement
- 2026-08-13
- top buyer share
- 36% of 30d volume
- trend 7d vs 30d
- 0.04x the 30d daily rate
- networks
- eip155:8453
- volume all-time
- $0.71
- settlements all-time
- 34
- median settlement 30d
- $0.01
- max settlement 30d
- $0.50
- settled via
- coinbase ($1.42, 33 tx), payAI ($0.02, 1 tx)
Attributed pro-quota: this payout address is shared, so volume is the operator-level figure divided by the services sharing it, while buyer and transaction counts stay whole. A declared convention, not an individually observed measure, and still a conservative undercount.
Currently sharing this payout address with x402-signature-service.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedProvides DeFi market data including funding rates, yields, and market snapshots
- category
- defi-data
- in
- query params
- auth
- api key
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| GET | /defi/funding-rates | $0.005 | Base | USDC | header | |
| GET | /defi/yields | $0.01 | Base | USDC | header | |
| GET | /market/snapshot | $0.002 | Base | USDC | header |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /defi/funding-rates returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://defi-signals.org/defi/funding-rates'
// 402 response (captured by monitor) · 3 payloads · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xE72b85A97A6e19413D8b80633787Eda6d6237A77",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://defi-signals.org/defi/funding-rates",
"mimeType": "application/json",
"description": "Cross-venue perpetual funding rates (OKX, Kraken Futures, dYdX) for any major token. Per-venue annualized rates plus the cross-venue spread in percentage points — a ready-to-use funding arbitrage signal. Clean JSON for trading and research agents."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"symbol": "BTC"
}
},
"output": {
"type": "json",
"example": {
"as_of": "2026-07-15T08:00:00Z",
"symbol": "BTC",
"venues": [
{
"rate": 0.0000795,
"venue": "okx",
"annualized_pct": 8.71,
"interval_hours": 8
}
],
"spread_annualized_pp": 5.87
}
}
},
"schema": {
"type": "object",
"$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": {
"symbol": {
"type": "string",
"description": "Token symbol, e.g. BTC, ETH, SOL"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xE72b85A97A6e19413D8b80633787Eda6d6237A77",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://defi-signals.org/defi/yields",
"mimeType": "application/json",
"description": "Top DeFi yield opportunities per chain from DefiLlama — TVL-filtered, outlier-cleaned (unsustainable meme-pool APYs removed), sorted by APY. Fields: project, symbol, apy_pct, apy_base_pct, tvl_usd, stable. Ideal for yield-hunting agents."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "Base",
"max_apy_pct": 300,
"min_tvl_usd": 1000000
}
},
"output": {
"type": "json",
"example": {
"chain": "Base",
"pools": [
{
"stable": true,
"symbol": "USDC",
"apy_pct": 5.42,
"project": "aave-v3",
"tvl_usd": 182400000,
"apy_base_pct": 5.42
}
],
"outliers_removed": 7
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"chain": {
"type": "string",
"description": "Chain name, e.g. Base, Ethereum, Arbitrum"
},
"max_apy_pct": {
"type": "number",
"description": "Outlier cap: pools above this APY are excluded (default 300)"
},
"min_tvl_usd": {
"type": "number",
"description": "Minimum pool TVL in USD (default 1000000)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xE72b85A97A6e19413D8b80633787Eda6d6237A77",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://defi-signals.org/market/snapshot",
"mimeType": "application/json",
"description": "One-call market snapshot: BTC/ETH/SOL spot prices with 24h change plus the Crypto Fear & Greed index. The cheapest way for an agent to establish market context."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"prices": {
"btc_usd": 118431,
"eth_usd": 4212.55
},
"fear_greed": {
"value": 71,
"classification": "Greed"
}
}
}
},
"schema": {
"type": "object",
"$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"
}
}
}
}
}
}
},
"x402Version": 2
}
] OVER TIME
All charts use the 24h selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/defi-signals-api/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.
Median across 3 endpoints. Use the selector to isolate one.
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
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.
Shared payout address (1 other service). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service figure is attributed, the assessment block and the ranking, it is the address total divided pro-quota by the 2 services sharing it: a declared convention, not an individually observed measure.
Shared payout address (1 other service). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Per-service buyer and transaction counts are shown whole (integers), not divided; only volume is attributed pro-quota. A declared convention, not an individually observed measure.
COMPLIANCE
14/14 checks pass · grade Alast 402 captured 2026-07-17 · last up 2026-08-13
- 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
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