{"uid":"cap_1BTNWwB5-0FDbN91Onseo","slug":"x402-endpoint-diligence-checker-f878c18f","name":"x402 Endpoint Diligence Checker","description":"Runs live diligence on an x402-metered endpoint before you pay it: verifies its 402 payment challenge is spec-compliant, checks the price against market baselines, inspects the payTo address on-chain (Base), checks third-party directory presence, and checks basic infra hygiene. Returns a 0-100 score, a pass/caution/fail verdict, and per-check evidence.; Compares an x402 endpoint's price (or a given price/category pair) against market percentiles from our daily radar snapshot of the x402 ecosystem.","url":"https://diligence.x402supply.com/tools/check_endpoint?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","format":"uri"}}},"responseSchema":{"type":"json","example":{"url":"https://example.com/api/paid","score":29,"checks":[{"name":"spec_compliance","result":"fail","weight":35,"evidence":"unexpected status 405 Method Not Allowed"},{"name":"price_sanity","result":"unknown","weight":15,"evidence":"no challenge to price"},{"name":"payto_onchain","result":"unknown","weight":25,"evidence":"no payTo address to check"},{"name":"directory_presence","result":"caution","weight":15,"evidence":"origin not found on x402scan or in our market-baseline snapshot — no third-party discovery footprint"},{"name":"infra_hygiene","result":"pass","weight":10,"evidence":"HTTPS enforced; domain registration age unavailable (RDAP lookup failed or unsupported TLD)"},{"name":"reseller_markup","result":"pass","weight":0,"evidence":"no reseller signals"}],"verdict":"fail","resellerMarkup":{"verdict":"no reseller signals","evidence":["No upstream catalog entry reached the two-distinctive-signal threshold."],"priceAsOf":null,"confidence":"none","markupMultiple":null,"matchedUpstream":null,"upstreamPriceUsd":null}}},"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":"unknown","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_tzcv8LogOGiu2Ya_Vx71v","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":"Runs live pre-payment diligence on an x402-metered API endpoint, verifying spec compliance, pricing fairness, on-chain payTo address integrity, directory presence, infra hygiene, and resale markup detection, returning a 0–100 trust score with pass/caution/fail verdict.","exampleAgentPrompt":"Before I pay anything, run diligence on this x402 endpoint — https://api.someservice.com/data — and tell me its trust score, whether it passes, and if the price looks fair compared to market baselines.","exampleUseCases":[{"title":"Pre-payment safety check for unknown API","prompt":"I found this x402-metered endpoint at https://inference.unknownprovider.io/complete — can you run diligence on it and tell me if it's safe to pay, what score it gets, and whether the payTo address checks out on Base?"},{"title":"Detect resale markup on x402 wrapper","prompt":"This x402 endpoint at https://llm.thirdparty.xyz/v1/chat looks like it might just be wrapping OpenAI with a markup — can you check it for resale evidence and tell me how much above market it's pricing?"},{"title":"Vet new x402 vendor before integrating","prompt":"We're about to integrate https://api.newvendor.com/weather into our agent pipeline — please run a full diligence check on it: 402 spec compliance, directory presence, infra hygiene, and overall verdict before we commit."}],"resultDescription":"Returns a structured result containing a 0–100 numeric trust score, an overall verdict of pass/caution/fail, and per-check evidence covering: 402 payment challenge spec compliance, price comparison against market baselines, on-chain verification of the payTo address on Base, third-party directory listing presence, basic infrastructure hygiene signals, and evidence-based markup estimates if upstream API resale is detected.","failureModes":["Target endpoint is unreachable or returns no 402 challenge — diligence cannot be performed","Invalid or malformed URL input — returns validation error","Target endpoint's on-chain address is on an unsupported network (non-Base) — partial results","Rate limiting or network timeout when probing target endpoint — incomplete check","Target URL points to a non-x402 endpoint — returns spec compliance failure with explanation"],"whenToPreferThis":"Use this endpoint any time an AI agent or developer is about to make a payment to an unknown or untrusted x402-metered API and wants to verify it is safe, fairly priced, and spec-compliant before committing funds. Prefer this over manual inspection when you need on-chain address verification on Base, structured pricing comparison, or automated resale markup detection — tasks that are impractical to do by hand. It is especially valuable in autonomous agent workflows where a human is not reviewing each payment decision.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T21:41:27.632Z","isFirstParty":false,"canonicalSlug":"x402-endpoint-diligence-checker-f878c18f"}