{"uid":"cap_sXYCjwM4ZSdhymmR3T7WI","slug":"x402-trust-discovery-api-endpoint-audit-d1c6d404","name":"x402 Trust & Discovery API — Endpoint Audit","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/audit?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"origin":{"type":"string","description":"Origin URL of the x402/MPP service to audit, e.g. https://api.example.com."}}},"responseSchema":{"type":"json","example":{}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aHYQWMLNOke6kl0mTrBZG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Performs a pre-purchase safety and reputation audit of an x402 or MPP endpoint without paying it, returning a go/test/do-not-pay verdict backed by onchain settlement history on Base.","exampleAgentPrompt":"Before my agent pays anything, can you audit https://api.example.com to see if it's safe — check its onchain settlement history on Base and tell me whether it's a go, test-with-minimum, or do-not-pay?","exampleUseCases":[{"title":"Pre-payment scam check for unknown API","prompt":"I found this x402 endpoint at https://data-feeds.xyz and I want to use it in my agent, but I've never heard of it — can you audit it for me and tell me if it's safe to pay or if I should stay away?"},{"title":"Vetting API before agent fleet deployment","prompt":"We're about to deploy 50 AI agents that will all pay https://analytics-api.io for data — before we roll that out, can you run a safety audit on that endpoint and check its Base settlement history?"},{"title":"Checking credential compatibility before purchase","prompt":"I want to know if the x402 endpoint at https://marketdata.example.com will even accept my credentials before I try paying it — can you audit it and check compatibility?"}],"resultDescription":"Returns a structured JSON verdict indicating whether the audited endpoint is safe to pay (go), should be tested with a minimum payment first (test-with-minimum), or should be avoided (do-not-pay), backed by onchain settlement history and reputation signals from Base. May also include credential compatibility information and any known red flags.","failureModes":["Origin URL is malformed or unreachable — returns error with details","Endpoint has no onchain history — verdict may be inconclusive or defaulted to test-with-minimum","Rate limiting if too many audit requests are made in quick succession","Empty or null origin parameter returns 400 validation error","Endpoint not registered in any known x402 registry — limited data available for verdict"],"whenToPreferThis":"Choose this endpoint when an AI agent or automated buyer needs to vet an unknown x402 or MPP-payable API before committing funds, especially when operating autonomously without human oversight. Ideal for agent orchestration pipelines where blindly paying an untrusted endpoint poses financial or security risk. Prefer this over manual inspection when you need a machine-readable go/no-go signal backed by real onchain data rather than a registry listing alone.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T14:27:34.559Z","isFirstParty":false,"canonicalSlug":"x402-trust-discovery-api-endpoint-audit-d1c6d404"}