{"uid":"cap_ia-rJcgsxlpXt1bkAScuZ","slug":"x402-trust-similar-endpoint-finder-383cc420","name":"x402 Trust: Similar Endpoint Finder","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/similar","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"limit":{"type":"integer"},"resource":{"type":"string"}}},"responseSchema":{"type":"json","example":{"note":"Semantically similar endpoints that out-score the subject. Similarity is cosine over description embeddings.","count":2,"subject":{"grade":"C","score":61.2,"vectorized":true,"inObservationSet":true},"resource":"https://api.example.com/v1/thing","alternatives":[{"grade":"A","score":88.1,"network":"eip155:8453","resource":"https://api.better.com/v1/thing","amountUsd":0.001,"similarity":0.912,"endpointPage":"https://x402-trust.com/endpoint/12345","priceCeiling":false,"recommendation":"proceed"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_TE4F08MG2oZWH9ucw8X1O","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns semantically similar x402 endpoints that score higher than a given subject endpoint, ranked by trust grade and similarity","exampleAgentPrompt":"Find me up to 5 x402 endpoints that are semantically similar to https://api.example.com/v1/thing but score higher on the x402 Trust index — I want to see alternatives with better grades and reliability.","exampleUseCases":[{"title":"Upgrade from low-grade API","prompt":"The x402 endpoint I'm using at https://api.mediocre.com/v1/transcribe has a C grade — find me up to 3 similar endpoints that score higher so I can switch to something more reliable."},{"title":"Benchmark endpoint against peers","prompt":"Can you pull up to 10 x402 endpoints that are semantically similar to https://api.example.com/v1/sentiment and show me how they rank compared to it by trust score?"},{"title":"Vet alternatives before integration","prompt":"Before I build against https://api.startup.io/v1/weather, show me up to 5 similar x402 endpoints that outrank it — I want to make sure I'm picking the best-scored option available."}],"resultDescription":"A JSON object containing the subject endpoint's grade and score, plus a ranked list of semantically similar endpoints that outscore it. Each alternative includes a letter grade (A–F), numeric trust score, network chain ID, USDC price, cosine similarity to the subject, a link to the full endpoint page on x402-trust.com, whether a price ceiling applies, and a proceed/caution recommendation.","failureModes":["Unknown or unindexed endpoint URL returns empty alternatives list or 404","Invalid resource URL format causes validation error","limit parameter too large may be capped or return fewer results","Payment failure (insufficient USDC) results in 402 response with no data","Endpoint not yet vectorized returns subject with vectorized:false and no alternatives","Network timeout if probe data is stale or service is under load"],"whenToPreferThis":"Use this endpoint when you already have an x402 endpoint URL and want to discover higher-quality alternatives ranked by real monitored trust data — uptime, compliance, on-chain settlement volume, and price history. Prefer this over generic API directories when you need trust-scored, x402-specific recommendations with semantic similarity matching rather than keyword search.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:44:34.929Z","isFirstParty":false}