{"uid":"cap_rx9uBnpJKyKmwpRLWXS93","slug":"x402-checker-paid-honesty-report-report-b822d647","name":"x402 Checker — Paid Honesty Report (/report)","description":"Free x402 wash/honesty look, free GET /board pay-to-rank, free GET /name?n= ENS-style agent name lookup, $0.05 USDC POST /name (30 day TTL) and POST /bid (adds to 24h total) and /report, $0.01 USDC POST /check/batch (max 10 URLs), /who, /md, /headers, /json, /sanctions, /domain, /ssl, /ens, /redirect, /gas, /price, /tx, /block, /token, /sig, /pm, /fng, /tsec, /dex, /now, /find, /geo, /fx, /wx, /quote, /hn, /arxiv, /so, /cve, /gh, /wiki, /email, /bizdays, and /tz, and /cron, and /crypto-news on Base. GET /check stays free for one URL. Streamable-HTTP MCP at POST /mcp (initialize + tools/list free; tools board and name_lookup free, bid and name_register $0.05). Crawler files: GET /llms.txt and GET /.well-known/agent.json (also agent-card.json). /headers is a raw header dump. /json validates JSON against a JSON Schema. /sanctions is an OFAC SDN digital-currency screen. /domain is a DNS/RDAP/TLS dossier. /ssl is TLS cert facts from public CT plus a live HTTPS HEAD. /ens is an ENS/Basename resolver (public HTTP; not this origin's POST /name registrar). /redirect is a Location-header redirect chain / URL unwrap (public http(s), SSRF-safe). /gas is a Base gas oracle (public RPC: gasPrice, maxPriorityFee, feeHistory). /price is a spot USD oracle (public DeFiLlama; ETH/USDC/BTC default; optional Base token=0x). /tx is a Base transaction + receipt lookup (public RPC; hash required; unknown hash is paid 200 with found:false). /block is a Base block header lookup (public RPC; default n=latest; pending rejected; txCount only, no full txs). /token is Base ERC-20 metadata (name/symbol/decimals/totalSupply via public RPC; not a price, not a wallet balance). /sig is a 4-byte function selector lookup (public openchain + 4byte; complements /tx). /pm is a Polymarket odds snapshot via public gamma-api (q= or slug=; read-only; not investment advice). /fng is the Crypto Fear & Greed Index via public alternative.me (optional limit=1..30; not investment advice). /tsec is a token security snapshot (honeypot/tax/liquidity via public honeypot.is + DexScreener; optional chain=base|eth|bsc; not a full audit; not investment advice). /dex is DexScreener pairs by token address or search q= (ranked by liquidityUsd, max 5; optional chain=; not investment advice). /now is a UTC clock (unix, ms, iso; alias /time; no params; for IANA zones use /tz). /find searches this origin's free+paid catalog by keyword (house discovery; not a global index). /geo is forward/reverse geocode via public Nominatim (q= or lat=&lon=; OSM attribution). /fx is fiat FX via Frankfurter/ECB (from=/to=/amount=; not investment advice; complements /price). /wx is current weather via public Open-Meteo (q= or lat=&lon=; units=metric|us). /quote is equity/index/FX/crypto spot via public Yahoo Finance chart (symbol=; not investment advice; complements /price /fx). /hn is Hacker News search via public Algolia (q=; optional tags=/sort=). /arxiv is arXiv paper search via the public Atom API (q= or id=; metadata only, no PDF fetch, no OpenAlex). /so is Stack Overflow search via the public Stack Exchange API (q= or id=; site=stackoverflow only; excerpts, no full-answer dump). /cve is CVE / NVD lookup via the public NIST NVD 2.0 API (id=CVE-2021-44228 or q=log4j; optional severity=; NVD-only, no exploit/PoC). /gh is GitHub public REST lookup via api.github.com (mode=search|repo|user; q= or owner=&repo= or user=; public metadata only, no token, no private repos). /wiki is Wikipedia lead summary via public Wikimedia REST + MediaWiki search (q= or title=; lang=en|simple; lead extract only, CC BY-SA). /email is syntax + MX via DoH (no SMTP). /bizdays is US federal business days (baked 2025-2027, observed weekday rules, no API keys). /tz is IANA timezone now + UTC offset + DST (no API keys). /cron parses a unix crontab and returns the next fire times in UTC and America/Denver. /crypto-news is a $0.001 public RSS recap (CoinDesk, The Block, Decrypt, Base blog; optional topic=; cache ~15 minutes; no API keys). Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.","url":"https://x402-checker.nock-for-mak.workers.dev/report","method":"GET","headers":{},"bodySchema":{"type":"object","$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","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"http(s) URL that returns HTTP 402 or an x402 resource URL. Paid honesty report; no payment headers are sent to the target."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"sku":"report","url":"https://example.com/paid-resource","risk":"payTo is an EOA. Amount 50000 (~$0.05 USDC). Not a recommendation to pay. HTTP probe only.","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","flags":["payTo_eoa"],"payTo":"0x0000000000000000000000000000000000000000","amount":"50000","has402":true,"network":"eip155:8453","summary":"HTTP 402. payTo, network, and amount were present on the challenge. This probe cannot see on-chain clusters or genuine demand.","bytecode":{"kind":"eoa","note":"EOA; no runtime bytecode","snippetSha256":null,"snippetHexPrefix":null,"runtimeByteLength":0,"snippetByteLength":0},"amountUsd":"0.05","payToKind":"eoa","shouldPay":"Unknown. This probe only reads the HTTP 402. It cannot see on-chain payer clusters, self-pay loops, or whether anyone else paid this for a real resource.","httpStatus":402,"reportKind":"honesty","facilitator":null,"amountAtomic":"50000","acceptsListed":{"count":1,"listed":[],"payToDisagrees":false,"distinctPayToCount":1},"headerBody402":{"compared":true,"mismatch":false},"wellKnownPayTo":{"note":"challenge payTo matches well-known x402 on this host","fetched":true,"matchesChallengePayTo":true},"facilitatorHost":null,"paymentRequired":{"accepts":[{"payTo":"0x0000000000000000000000000000000000000000","amount":"50000","scheme":"exact","network":"eip155:8453"}],"x402Version":2}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kDTvP4ZvkG2eF9IeOPmAv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a comprehensive x402 payment honesty report for a target URL, revealing payTo address, network, amount, risk flags, bytecode analysis, and OFAC/facilitator metadata — all without sending any payment headers to the target.","exampleAgentPrompt":"Before I pay that 402-gated API, can you pull the full x402 honesty report for https://some-paid-api.example.com/data and tell me whether the payTo looks legit, what network it's on, how much it costs in USD, and whether there are any risk flags?","exampleUseCases":[{"title":"Vet a 402 API before paying","prompt":"I'm about to pay an x402 charge at https://paywalled-data.example.com/endpoint — can you run the honesty report on it and tell me if the payTo address is a real contract or just an EOA, what the risk flags are, and whether the amount matches what they claim?"},{"title":"Detect self-pay loop risk","prompt":"Run the x402 report on https://suspicious-402.example.com/resource and check whether there are any signs of a self-pay loop or that the payTo disagrees with the well-known x402 config on that host."},{"title":"Confirm network and amount before agent micropayment","prompt":"My agent is about to auto-pay a 402 resource at https://agent-api.example.com/premium — get the honesty report and confirm it's on Base (eip155:8453), the amount is under $0.10 USDC, and there are no flags before we proceed."}],"resultDescription":"A JSON object containing: risk summary string, payTo address and kind (EOA vs contract), amount in atomic units and USD, network identifier, array of risk flags, bytecode analysis (kind, runtimeByteLength, snippetSha256), facilitator host, well-known payTo match status, HTTP 402 confirmation, acceptsListed count and payTo disagreement check, full paymentRequired.accepts array, and a shouldPay advisory string explaining probe limitations.","failureModes":["Target URL does not return HTTP 402 — report will reflect no 402 found","Target URL is unreachable or times out — probe fails with connectivity error","Malformed x402 challenge headers on target — fields may be missing or null in response","payTo address is zero address or invalid — flagged but not blocked","OFAC/bytecode lookup fails — partial report returned without those fields","Payment of $0.05 USDC to x402-checker itself fails — endpoint returns 402 unpaid"],"whenToPreferThis":"Use this endpoint when you need a comprehensive, structured risk report on a single x402 URL before authorizing payment — it goes far beyond the free GET /check by including bytecode analysis, well-known payTo matching, facilitator metadata, OFAC screening signals, and a detailed shouldPay advisory. Prefer /check/batch for multiple URLs at once (cheaper at $0.01 USDC for up to 10), and use the free GET /check for a quick single-URL sanity check without paying.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:45:05.002Z","isFirstParty":false}