{"uid":"cap_8sCb8LDD4v8xD0F_xacMu","slug":"x402-site-audit-tool-29aaae33","name":"x402 Site Audit Tool","description":"Fetch a public API origin and audit x402 discovery, OpenAPI, pricing, llms.txt, robots, sitemap, MCP metadata, health, endpoint counts, payment schemes, and buyer-readiness signals. This deterministic endpoint does not call an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.001 per request with x402 USDC on Base.","url":"https://gpt55.558686.xyz/v1/tools/x402-site-audit","method":"GET","headers":{},"bodySchema":{"type":"object","$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","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object","additionalProperties":true},"queryParams":{"type":"object","anyOf":[{"required":["url"]},{"required":["base_url"]}],"properties":{"url":{"type":"string","maxLength":2048,"minLength":1},"base_url":{"type":"string","maxLength":2048,"minLength":1},"max_bytes":{"type":"integer","maximum":1048576,"minimum":4096},"timeout_ms":{"type":"integer","maximum":10000,"minimum":1000},"include_optional":{"type":"boolean"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"ok":{"type":"boolean"},"tool":{"type":"string"},"fetchedAt":{"type":"string"}},"additionalProperties":true}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{"url":"https://example.com","max_bytes":65536,"timeout_ms":5000,"include_optional":true}},"output":{"type":"object","example":{"ok":true,"tool":"x402-site-audit","fetchedAt":"2024-01-15T10:30:00Z"}}},"response":{"ok":false,"mcp":{"present":false,"toolCount":0,"serverName":null,"sampleTools":[]},"url":"https://example.com","tool":"x402SiteAudit","x402":{"payTo":null,"hasUpto":false,"network":null,"openapi":null,"present":false,"pricing":null,"schemes":[],"version":null,"hasExact":false,"facilitator":null,"serviceName":null,"resourceCount":0,"featuredResourceCount":0},"grade":"F","ready":false,"score":10,"checks":[{"id":"home","ok":true,"json":false,"path":"/","bytes":559,"status":200,"finalUrl":"https://example.com/","required":true,"contentType":"text/html"},{"id":"health","ok":false,"json":false,"path":"/health","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/health","required":false,"contentType":"text/html"},{"id":"openapi","ok":false,"json":false,"path":"/openapi.json","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/openapi.json","required":true,"contentType":"text/html"},{"id":"x402","ok":false,"json":false,"path":"/.well-known/x402","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/.well-known/x402","required":true,"contentType":"text/html"},{"id":"x402Service","ok":false,"json":false,"path":"/.well-known/x402-service","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/.well-known/x402-service","required":false,"contentType":"text/html"},{"id":"pricing","ok":false,"json":false,"path":"/pricing.json","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/pricing.json","required":true,"contentType":"text/html"},{"id":"llms","ok":false,"json":false,"path":"/llms.txt","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/llms.txt","required":false,"contentType":"text/html"},{"id":"llmsFull","ok":false,"json":false,"path":"/llms-full.txt","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/llms-full.txt","required":false,"contentType":"text/html"},{"id":"robots","ok":false,"json":false,"path":"/robots.txt","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/robots.txt","required":false,"contentType":"text/html"},{"id":"sitemap","ok":false,"json":false,"path":"/sitemap.xml","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/sitemap.xml","required":false,"contentType":"text/html"},{"id":"serverJson","ok":false,"json":false,"path":"/server.json","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/server.json","required":false,"contentType":"text/html"},{"id":"mcpJson","ok":false,"json":false,"path":"/.well-known/mcp.json","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/.well-known/mcp.json","required":false,"contentType":"text/html"},{"id":"mcpConfig","ok":false,"json":false,"path":"/mcp/config","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/mcp/config","required":false,"contentType":"text/html"},{"id":"agentCard","ok":false,"json":false,"path":"/.well-known/agent-card.json","bytes":559,"error":"Not Found","status":404,"finalUrl":"https://example.com/.well-known/agent-card.json","required":false,"contentType":"text/html"}],"origin":"https://example.com","openapi":{"title":null,"present":false,"version":null,"pathCount":0,"operationCount":0,"sampleOperations":[]},"pricing":{"model":null,"prices":[],"present":false,"hasTokenMetered":false},"fetchedAt":"2026-06-12T05:13:46.589Z","missingRequired":["/openapi.json","/.well-known/x402","/pricing.json"],"recommendations":["Expose /openapi.json with machine-readable paid endpoints.","Expose /.well-known/x402 with x402 resources, accepts, network, payTo, and pricing links.","Publish exact or upto x402 payment schemes in discovery metadata.","Publish the x402 payTo address in discovery metadata.","Expose /pricing.json with price, limits, and billing mode.","Expose llms.txt or llms-full.txt for agent-readable product instructions.","Expose MCP server metadata when targeting agent tool buyers."]}},"exampleRequest":{"url":"https://example.com","max_bytes":65536,"timeout_ms":5000,"include_optional":true},"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GDeNG6QP5cFdmG9lHdGD9","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches and audits a website or API endpoint for x402/API buyer-readiness, returning a structured compliance and readiness report.","exampleAgentPrompt":"Can you run an x402 buyer-readiness audit on https://example.com and tell me if it's properly set up to accept x402 USDC micropayments?","exampleUseCases":null,"resultDescription":"Returns a JSON object with an 'ok' boolean, tool name ('x402SiteAudit'), and a structured summary describing the audited site's x402/API buyer-readiness, including compliance indicators and fetch metadata.","failureModes":["Missing required 'url' or 'base_url' query parameter returns a validation error","Unreachable or invalid URL results in a timeout or fetch failure","URL exceeds max_bytes limit causing truncated or failed fetch","Timeout set below 1000ms or above 10000ms returns a parameter validation error","Non-HTTP URL type in input causes schema rejection"],"whenToPreferThis":"Use this endpoint when you need to quickly and cheaply ($0.001 USDC) audit a specific URL or API base for x402 payment protocol readiness without a subscription. Prefer this over manual inspection when you need a structured, machine-readable report on x402 compliance signals.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:43:24.687Z","isFirstParty":false}