{"uid":"cap_df0HLbOsyfihLztsL-UHf","slug":"x402-trust-semantic-search-3b364249","name":"x402 Trust Semantic Search","description":"Trust, reputation & reliability scores for x402 endpoints. We monitor every listed x402 service 24/7: uptime probes, 402-envelope compliance, price history, and real on-chain USDC settlement volume. Free grade & recommendation for any endpoint, $0.005 for a full data breakdown.","url":"https://x402-trust.com/v1/semantic-search","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"limit":{"type":"integer"},"query":{"type":"string"}}},"responseSchema":{"type":"json","example":{"note":"Ranked by cosine similarity, with trust score as a tiebreaker. score/grade are null when the endpoint is not yet scored. No verdict or flag detail here: POST /v1/x402-trust carries those.","count":2,"query":"weather forecast","matches":[{"id":12345,"grade":"A","score":88.1,"resource":"https://api.weather.example/v1/forecast","amountUsd":0.002,"similarity":0.912,"description":"Hyperlocal weather forecasts, priced per call.","endpointPage":"https://x402-trust.com/endpoint/12345","priceCeiling":false},{"id":12399,"grade":null,"score":null,"resource":"https://wx.example.net/api/now","amountUsd":null,"similarity":0.874,"description":null,"endpointPage":"https://x402-trust.com/endpoint/12399","priceCeiling":false}],"generatedAt":1782826208450}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_f0L0Omjk9NJvitBdyPpe_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Searches the x402 Trust index for x402 payment endpoints matching a natural-language query, returning ranked results with trust grades and scores","exampleAgentPrompt":"Search x402 Trust for the top 5 x402 endpoints related to real-time stock prices, and show me their trust grades and per-call costs.","exampleUseCases":[{"title":"Find trusted AI inference endpoints","prompt":"Search x402 Trust for the top 10 x402 APIs for running LLM inference, ranked by trust score — I want to see their grades and prices before committing to one."},{"title":"Discover cheap data enrichment services","prompt":"Find me x402 endpoints for company enrichment or firmographic data — return up to 5 results so I can compare their trust grades and USDC prices."},{"title":"Locate a fallback API when primary fails","prompt":"My primary x402 weather API just went down — search x402 Trust for up to 3 alternative weather forecast endpoints and tell me their trust scores so I can pick a reliable backup."}],"resultDescription":"Returns a ranked list of up to `limit` x402 endpoint matches, each containing: a numeric endpoint ID, letter-grade trust rating (A–F or null if unscored), numeric trust score (0–100 or null), the resource URL, price in USD (or null), cosine similarity to the query, a short description, a link to the full endpoint page on x402-trust.com, and a priceCeiling flag. Also includes total match count, the original query, and a generation timestamp.","failureModes":["Query too vague returns low-similarity, unrelated endpoints","Endpoints in index may not yet have trust scores (grade and score return null)","Limit parameter ignored or capped at server maximum","Price data absent for newly listed or unmonitored endpoints","Service returns empty matches array if no endpoints match the query","Malformed request body returns 4xx error"],"whenToPreferThis":"Use this endpoint when an AI agent needs to discover x402-compatible payment endpoints by semantic description rather than exact URL — especially when comparing options by trust grade, uptime reliability, or price before committing to a paid API call. Prefer over manual browsing or raw x402scan listings when trust ranking and semantic similarity are needed together.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:58:10.461Z","isFirstParty":false}