{"uid":"cap_vvuy8SysCrVx0n0xhq7-S","slug":"agent-audit-x402-seller-link-health-quote-verifier-e335e771","name":"Agent Audit - x402 Seller Link Health & Quote Verifier","description":"Read-only x402 seller audit, link health and quote verification. Pay per call in USDC on Base via x402.","url":"https://agent-audit.agent-audit.workers.dev/v1/audit?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"Origin or paid endpoint URL"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"grade":"C","score":72,"counts":{"fail":0,"pass":12,"warn":7},"findings":[{"id":"llms-missing","message":"No /llms.txt (404)","severity":"warn"}]}},"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_XIngLOnICpAykD9CstXmO","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":"Audits an x402 paid endpoint URL for link health, quote validity, and seller compliance, returning a grade, score, and categorized findings.","exampleAgentPrompt":"Can you run an audit on my x402 endpoint at https://myapi.example.com/v1/data and tell me the grade, score, and any warnings or failures it has?","exampleUseCases":[{"title":"Pre-launch x402 seller readiness check","prompt":"Before I go live, can you audit my x402 API at https://myservice.workers.dev/v1/paid to see if it passes all the seller requirements and tell me what grade it gets?"},{"title":"Diagnosing a failing paid endpoint","prompt":"My x402 endpoint at https://api.myproduct.com/v1/premium seems to be rejecting payments — can you audit it and show me exactly what checks are failing and why?"},{"title":"Verifying llms.txt and quote health","prompt":"Can you audit https://data.myagentservice.com/v1/endpoint for me? I want to know if the /llms.txt is present, the quote is valid, and what warnings I should fix to get a better score."}],"resultDescription":"Returns a JSON object with an overall letter grade (e.g. 'C'), a numeric score (0–100), a breakdown of pass/fail/warn counts, and a detailed findings array where each finding has an id, human-readable message, and severity level (pass, warn, or fail).","failureModes":["Missing or invalid 'url' query parameter returns an error","Unreachable target URL may result in all checks failing or a timeout","Malformed x402 endpoint may return low score with multiple fail findings","Payment failure (USDC on Base) prevents the audit from executing","Rate limiting or Cloudflare Worker downtime may cause 5xx errors"],"whenToPreferThis":"Choose this endpoint when you need to programmatically audit an x402-compatible paid API endpoint for spec compliance, link health, and quote validity. It is specifically designed for the x402 payment protocol ecosystem and produces structured, actionable findings — prefer it over generic uptime monitors or HTTP health checks when you need x402-aware validation including quote verification and seller-side compliance scoring.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:39:39.436Z","isFirstParty":false,"canonicalSlug":"agent-audit-x402-seller-link-health-quote-verifier-e335e771"}