{"uid":"cap_dwd8_XiqRSK5EK_e8M81-","slug":"annalist-x402-service-checker-4d61ffb1","name":"Annalist x402 Service Checker","description":"Signed data for AI agents, paid per call over x402. Hyperliquid crowd state, smart money and liquidations with what historically happened next, plus independent checks of x402 services and MCP servers.","url":"https://api.annalist.dev/v1/checks/service?utm_source=zero.xyz","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"],"type":"string"},"queryParams":{"type":"object","properties":{"url":{"type":"string","description":"or any URL on the service"},"host":{"type":"string","description":"host name, for example api.example.com"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{"host":"api.example.com","flags":[],"grade":"B","usage":{"organic_payers_30d":41},"reasons":["quoted price matches listing"],"reliability":{"up_share_7d":0.98}}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZaJNM5d75KH1SDxU9pPvC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns an independent reliability and trust grade for an x402-compatible HTTP service, including uptime share, organic payer count, and flag reasons.","exampleAgentPrompt":"Can you check whether api.example.com is a trustworthy x402 service — I want to know its grade, uptime, and how many real users are actually paying for it before I integrate it?","exampleUseCases":[{"title":"Vetting an x402 API before agent integration","prompt":"Before my agent starts paying for calls to api.someprovider.com, can you run an independent check on it — I want to see the trust grade, any red flags, and how reliable it's been over the past week?"},{"title":"Comparing reliability of two paid AI services","prompt":"Check the Annalist trust score and uptime for api.toolA.com — I'm trying to decide if it's better than the other service I'm already using and want to see how many organic payers it has."},{"title":"Due diligence on an MCP server","prompt":"I found an MCP server at mcp.somevendor.dev that charges per call over x402 — can you get me an independent grade and reliability report on it so I know if it's legit before I plug it into my workflow?"}],"resultDescription":"A JSON object containing the host, a letter grade (e.g. 'B'), a list of flags (issues detected), human-readable reasons supporting the grade, organic payer count over the past 30 days, and a 7-day uptime share ratio — all independently assessed by Annalist.","failureModes":["Unknown host: host not found in Annalist's index, returns empty or low-confidence result","Invalid URL or host parameter: missing required query param returns error","Service too new: insufficient data to grade, may return null reliability fields","Network timeout: upstream check takes too long, returns partial data","Non-x402 service queried: endpoint may return flags indicating service is not x402-compatible"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to independently verify the trustworthiness, reliability, and organic usage of an x402-compatible HTTP service or MCP server before committing to paid calls. It is especially valuable when evaluating unfamiliar APIs discovered through x402scan or bazaar marketplaces, or when building agent workflows that require automated due diligence on third-party paid services.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-14T06:38:49.992Z","isFirstParty":false,"canonicalSlug":"annalist-x402-service-checker-4d61ffb1"}