●

Neynar

Data PAYMENT-READY

payment-ready until 2026-08-21

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

BASE URL https://api.neynar.com │ WEBSITE https://neynar.com │ ENDPOINTS 3 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-02-09 │ MONITORED SINCE 2026-04-15

ASSESSMENT

updated 2h ago

Evidence-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: 357ms
avg response: 253ms
total checks: 7,250

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.

jump to compliance checklist

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 $8.24 30d · 6 buyers · top buyer 97%

volume 30d: $8.24
buyers 30d: 6
settlements 30d: 824
first settlement: 2026-01-16
last settlement: 2026-07-17
top buyer share: 97% 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 ($8.24, 824 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-derived

Provides API services for accessing Farcaster social network data including casts, feeds, and user information

category: social-api
in: query params

social-mediafarcasterapidata-fetching

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
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)

3 endpoints

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.

// request

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 90d 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.

UPTIME

90d UPTIME 99.7%

RESPONSE TIME

AVG RESP 253ms

PRICE (captured 402, USD)

Median across 3 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

13/14 checks pass · grade A · failing: declares the current x402 version (2)

last 402 captured 2026-06-16 · last up 2026-08-14

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

08:33:00 UTC ● OK 111ms

08:27:01 UTC ● OK 359ms

08:21:00 UTC ● OK 117ms

08:15:00 UTC ● OK 102ms

08:09:00 UTC ● OK 103ms

08:03:00 UTC ● OK 106ms

07:57:00 UTC ● OK 197ms

07:51:00 UTC ● OK 106ms

07:45:00 UTC ● OK 177ms

07:39:00 UTC ● OK 104ms

07:33:00 UTC ● OK 117ms

07:27:00 UTC ● OK 104ms

07:21:00 UTC ● OK 107ms

07:15:01 UTC ● OK 239ms

07:09:02 UTC ● OK 211ms

07:04:00 UTC ● OK 106ms

06:58:00 UTC ● OK 200ms

06:52:00 UTC ● OK 205ms

EMBED THIS BADGE

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status

Neynar uptime on x402-list — live uptime

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RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

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