{"uid":"cap_Te_ERC4yh8S-FCJ5h-tIV","slug":"assay-agentdiet-dev-a2a-v0-3-0-agent-card-manifest-endpoint-7f310871","name":"A2A v0.3.0 Agent Card Manifest Endpoint","description":"Return canonical A2A v0.3.0 Agent Card manifest (Live x402 v2, IETF MPP & MCP endpoint at https://assay.agentdiet.dev)","url":"https://assay.agentdiet.dev/.well-known/agent-card.json?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["target"],"properties":{"target":{"type":"string","default":"https://agentdiet.dev"}}},"responseSchema":{"type":"object","required":["status","grade","score"],"properties":{"grade":{"type":"string"},"score":{"type":"integer"},"status":{"type":"string"},"target":{"type":"string"},"has_more":{"type":"boolean"},"next_cursor":{"type":"string","nullable":true}}},"example":null,"exampleRequest":null,"tags":[],"displayCostAmount":"0.005000","displayCostAsset":"USD","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.005000/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005000","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005000","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_l-_Q1XkHX4DrDU-LKJnUR","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005000","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":"assay.agentdiet.dev","brandSlug":"assay-agentdiet-dev-mpp","brandBaseUrl":"https://assay.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Returns the canonical A2A v0.3.0 Agent Card JSON manifest for a target A2A/MCP/x402 endpoint, including its grade, score, and status.","exampleAgentPrompt":"Can you fetch the canonical A2A v0.3.0 agent card manifest for https://agentdiet.dev and tell me its grade and score?","exampleUseCases":[{"title":"Inspect agent card before integration","prompt":"Before I integrate with that new A2A service, can you pull its agent card manifest for https://someagent.example.com and show me the grade, score, and status?"},{"title":"Verify protocol conformance of an endpoint","prompt":"I need to know if https://myagent.example.com is properly conformant with the A2A v0.3.0 spec — can you fetch its agent card and report the grade and score?"},{"title":"Audit a third-party MCP endpoint","prompt":"Can you retrieve the A2A agent card manifest for https://partner.example.com and tell me what grade it got so I know if it's trustworthy to use?"}],"resultDescription":"Returns a JSON object containing the agent card manifest for the target endpoint, including a status string, an alphanumeric grade (e.g. A, B, C), an integer score, the target URL, and optional pagination fields (has_more, next_cursor) for paginated audit records.","failureModes":["Target URL is unreachable or returns non-200 — status field reflects failure","Invalid or malformed target URL parameter — likely 400 error","Target endpoint does not implement A2A v0.3.0 — grade may reflect non-conformance","Pagination cursor is invalid or expired — empty or error response","Rate limiting or payment failure for the $0.005 per-call fee — 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need to programmatically retrieve the canonical A2A v0.3.0 Agent Card manifest for any A2A, MCP, or x402 endpoint — especially when you need a structured grade and score to evaluate protocol conformance before integration. Prefer this over manual inspection when automating agent discovery pipelines or vetting third-party services at scale.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:30:16.511Z","isFirstParty":false,"canonicalSlug":"assay-agentdiet-dev-a2a-v0-3-0-agent-card-manifest-endpoint-7f310871"}