{"uid":"cap_C0xEjDZgy4kCJ8tWMxkw1","slug":"x402-trust-discovery-api-endpoint-safety-guard-a6775b54","name":"x402 Trust & Discovery API — Endpoint Safety Guard","description":"Independent pre-purchase safety and reputation checks for x402 and MPP endpoints, plus keyless onchain data on Base. Accepts BOTH EIP-3009 and Circle Gateway credentials — only 141 of 788 Base-payable resources do, and a single-credential buyer is locked out of 53.8% of this market on one rail or 28.3% on the other. GET /v1/guard?url=&credential= answers whether the credential you carry can pay a given endpoint at all, before you try. Searching this market for \"is this API endpoint a scam\" returns registries and explorers but no dedicated service; that gap is what /v1/guard fills, inspecting an endpoint WITHOUT paying it and returning a go / test-with-minimum / do-not-pay verdict backed by onchain settlement history.","url":"https://gkyf2bs3b4p35hwwg5zzsnejeu.srv.us/v1/endpoint?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","description":"Full URL of the x402 resource to look up."}}},"responseSchema":{"type":"json","example":{}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_OL_NIX0WkCelLLFaZ7pyT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Pre-purchase safety and reputation check for x402/MPP endpoints, returning a go/test/do-not-pay verdict before any payment is attempted","exampleAgentPrompt":"Before I pay it, check whether https://someapi.example.com/v1/data is safe to call — I'm holding an EIP-3009 credential and want to know if it'll even work, and whether the endpoint has a clean onchain history.","exampleUseCases":[{"title":"Pre-payment scam check for unknown API","prompt":"I found this x402 endpoint at https://random-api.xyz/v1/results and I want to pay for it, but I'm not sure if it's legit — can you check whether it's safe to pay before I send any USDC?"},{"title":"Credential compatibility before purchase","prompt":"I only have a Circle Gateway credential and I'm about to pay https://data-provider.io/v1/feed — will my credential actually work with that endpoint, or will I get locked out?"},{"title":"Onchain settlement history due diligence","prompt":"Can you pull up the onchain settlement history for https://analytics.payapi.net/v1/report and tell me if it has a trustworthy track record before I integrate it into my agent pipeline?"}],"resultDescription":"A JSON response containing a safety verdict (go / test-with-minimum / do-not-pay), credential compatibility status for EIP-3009 and Circle Gateway rails, onchain settlement history data from Base, and reputation signals about the queried x402 endpoint — all returned without making any payment to the target endpoint.","failureModes":["URL not found or not an x402 endpoint — endpoint may return an unknown/unregistered status","Network timeout if the target endpoint is unreachable for inspection","Invalid or malformed URL input returns a validation error","Endpoint not yet indexed — new endpoints may lack settlement history","Credential type not recognized — unsupported credential identifiers return an error"],"whenToPreferThis":"Use this endpoint when an AI agent or buyer needs to vet an x402 or MPP endpoint before committing any payment — especially when credential compatibility is uncertain (EIP-3009 vs Circle Gateway), the endpoint source is unfamiliar, or onchain settlement history is needed without triggering an actual transaction. Prefer this over generic blockchain explorers or registries when you need a single actionable verdict rather than raw chain data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-03T05:27:24.292Z","isFirstParty":false,"canonicalSlug":"x402-trust-discovery-api-endpoint-safety-guard-a6775b54"}