{"uid":"cap_ilLNkfsAuzQweNxSgp93Y","slug":"x402-trust-semantic-search-2a0f68e3","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.fuchss.app/v1/semantic-search?utm_source=zero.xyz","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","similarity":0.912,"description":"Hyperlocal weather forecasts, priced per call.","endpointPage":"https://x402.fuchss.app/endpoint/12345"},{"id":12399,"grade":null,"score":null,"resource":"https://wx.example.net/api/now","similarity":0.874,"description":null,"endpointPage":"https://x402.fuchss.app/endpoint/12399"}],"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_Jo9b0-siEtCEA73iQz5tm","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":"Search the x402 endpoint catalog by natural language query and receive ranked matches with trust grades and similarity scores","exampleAgentPrompt":"Search the x402 Trust catalog for endpoints related to 'real-time stock price data' and return the top 5 matches with their trust grades and similarity scores.","exampleUseCases":[{"title":"Discover trusted weather APIs","prompt":"Search the x402 endpoint catalog for 'weather forecast' services and show me the top 3 results with their trust grades so I can pick the most reliable one."},{"title":"Find NLP processing endpoints","prompt":"I need an x402 endpoint that does sentiment analysis or text classification — search the catalog for the best 5 matches and include their trust scores."},{"title":"Locate image generation micropayment APIs","prompt":"Search x402 Trust for 'image generation' endpoints, limit to 10 results, and tell me which ones have trust grades so I know which are safe to pay."}],"resultDescription":"A JSON object containing a ranked list of up to `limit` x402 endpoint matches, each with: endpoint ID, resource URL, trust grade (A–F or null if unscored), numeric trust score (0–100 or null), cosine similarity to the query, a short description, and a link to the full endpoint page on x402.fuchss.app. Results are sorted by cosine similarity with trust score as tiebreaker. Also includes total match count, the original query, and a timestamp.","failureModes":["Empty query string returns no matches or an error","Limit set to 0 or a negative integer may cause a bad request response","Query too long or malformed JSON body returns 400","No matching endpoints in catalog returns count:0 with empty matches array","Payment failure (insufficient USDC) blocks the request before processing","Endpoints with null grade/score indicate not yet evaluated by the trust system"],"whenToPreferThis":"Use this endpoint when you need to discover x402-compatible API endpoints by topic or capability description rather than by exact URL, especially when you want results pre-filtered by trust quality. Prefer this over a generic web search when you specifically want endpoints compatible with the x402 payment protocol and want cosine-similarity ranking combined with trust grades to surface reliable options quickly.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T18:34:20.767Z","isFirstParty":false,"canonicalSlug":"x402-trust-semantic-search-2a0f68e3"}