{"uid":"cap_lzJVBxU0PdS90T_a8blvu","slug":"agent-card-well-known-linter-270c7c12","name":"Agent Card Well-Known Linter","description":"Paid agent card and well-known validator route for autonomous agents. Returns JSON with provenance, route-specific evidence, and machine-readable fields. Price 0.03 USDC on Base via x402. Demo/preview: https://agent-card-validator-mcp.mtree.workers.dev/demo/lint. Contact: https://agent-card-validator-mcp.mtree.workers.dev/contact.","url":"https://agent-card-validator-mcp.mtree.workers.dev/v1/wellknowns/lint","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","properties":{"base_url":{"type":"string"}},"additionalProperties":true},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":{"request":{"input":{"body":{"base_url":"https://example.com"},"type":"http","method":"POST","bodyType":"json"}},"response":{"url":"https://example.com/.well-known/agent-card.json","valid":false,"errors":[{"path":"$","message":"agent-card.json fetch failed (HTTP 404)","severity":"fatal"}],"base_url":"https://example.com","linted_at":"2026-06-03T23:08:55.831Z"}},"exampleRequest":{"base_url":"https://example.com"},"tags":["x402"],"displayCostAmount":"0.03","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":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Lpud-wp97-pzsxo383B-b","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Lints and validates well-known agent card URLs, checking them for correctness and returning provenance-annotated JSON results.","exampleAgentPrompt":"Can you lint and validate the well-known agent card at https://myagent.example.com/.well-known/agent.json and tell me if there are any errors or provenance issues?","exampleUseCases":null,"resultDescription":"A JSON object containing lint results for the submitted well-known agent card URL, including validation errors, warnings, and provenance metadata about the agent card's structure and compliance.","failureModes":["Invalid or unreachable well-known URL returns error response","Malformed agent card JSON causes parse errors in output","Payment not included or insufficient (x402 payment required at $0.03 USDC)","URL does not resolve to a valid well-known endpoint","Network timeout reaching the target well-known URL"],"whenToPreferThis":"Use this endpoint when you need to validate or lint an AI agent's well-known card endpoint, particularly in autonomous agent pipelines that need to verify agent card compliance before interacting with another agent. Prefer this over manual inspection when you need structured, provenance-tagged lint results.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:35:12.104Z","isFirstParty":false}