payment-ready until 2026-08-20
Farcaster protocol data API (users, casts, feeds, reactions). x402 pay-per-request in USDC on Base.
Pay from $0.01 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.
first settlement 2026-01-16 · $179.26 all-time · settled via coinbase
ASSESSMENT
updated 3h 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
- 99.7%
- response p95
- 366ms
- avg response
- 255ms
- total checks
- 7,305
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
compliance A (13/14): declares the current x402 version (2)
13 of 14 x402 conformance checks pass; failing: declares the current x402 version (2). Full checklist below.
price $0.01 (p53 in Data)
- price (min)
- $0.01
- category percentile (min)
- p53 in Data
- endpoints / prices
- 3 / 1
- model
- flat
- 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
- 1378d
- registrar
- Amazon Registrar, Inc.
- hosting
- custom
- domain created
- 2022-11-01
Identity facts, not a risk score.
traction $8.33 30d · 7 buyers · top buyer 96%
- volume 30d
- $8.33
- buyers 30d
- 7
- settlements 30d
- 833
- first settlement
- 2026-01-16
- last settlement
- 2026-07-17
- top buyer share
- 96% of 30d volume
- trend 7d vs 30d
- 0.00x the 30d daily rate
- networks
- eip155:8453
- volume all-time
- $179.26
- settlements all-time
- 36,246
- median settlement 30d
- $0.01
- max settlement 30d
- $0.01
- settled via
- coinbase ($8.33, 833 tx)
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedProvides API services for accessing Farcaster social network data including casts, feeds, and user information
- category
- social-api
- in
- query params
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| GET | /v2/farcaster/cast | Fetch cast by hash | $0.01 | Base | USDC | body (v1 style) |
| GET | /v2/farcaster/feed | Farcaster feed | $0.01 | Base | USDC | body (v1 style) |
| GET | /v2/farcaster/user/by_username | Lookup user by Farcaster handle | $0.01 | Base | USDC | body (v1 style) |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /v2/farcaster/cast returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://api.neynar.com/v2/farcaster/cast'
// 402 response (captured by monitor) · 3 payloads · click to expand
[
{
"error": "X-PAYMENT header or API key required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xA6a8736f18f383f1cc2d938576933E5eA7Df01A1",
"scheme": "exact",
"network": "base",
"mimeType": "",
"resource": "http://api.neynar.com/farcaster/user/by_username",
"description": "",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"discoverable": true
}
},
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 60
}
],
"x402Version": 1
},
{
"error": "X-PAYMENT header or API key required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xA6a8736f18f383f1cc2d938576933E5eA7Df01A1",
"scheme": "exact",
"network": "base",
"mimeType": "",
"resource": "http://api.neynar.com/farcaster/cast",
"description": "",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"discoverable": true
}
},
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 60
}
],
"x402Version": 1
},
{
"error": "X-PAYMENT header or API key required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xA6a8736f18f383f1cc2d938576933E5eA7Df01A1",
"scheme": "exact",
"network": "base",
"mimeType": "",
"resource": "http://api.neynar.com/farcaster/feed",
"description": "",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"discoverable": true
}
},
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 60
}
],
"x402Version": 1
}
] 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/neynar/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.
COMPLIANCE
13/14 checks pass · grade A · failing: declares the current x402 version (2)last 402 captured 2026-06-16 · 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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