{"uid":"cap_mzn23K6nh1CiCObwQWDZ4","slug":"a2a-agent-card-check-d5579a69","name":"A2A Agent Card Check","description":"Fetch and validate a peer agent's A2A Agent Card (v1.0 / v0.3): fields, skills, interfaces, auth, signature, reachability. Score 0-100 + issues.","url":"https://gogeta2-u35175.vm.elestio.app/agents/v1/agent/a2a-card?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":"Agent base URL/domain or direct card URL, e.g. https://sabli.app"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aHRx9lcSLjzGx0rgL18t8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetch and validate a peer agent's A2A Agent Card (v1.0/v0.3), scoring it 0-100 with detailed field, skill, auth, signature, and reachability analysis.","exampleAgentPrompt":"Can you fetch and validate the A2A agent card at https://sabli.app and give me a score plus any issues you find with its fields, skills, auth, and reachability?","exampleUseCases":[{"title":"Pre-integration agent card audit","prompt":"Before I integrate with the agent at https://someagent.example.com, can you fetch and validate its A2A agent card and tell me the score and any problems with the fields, skills, or authentication setup?"},{"title":"Checking agent card version compliance","prompt":"I need to know if the agent hosted at https://myagentplatform.io is serving a compliant A2A v1.0 card — can you check the card, score it, and list any missing or invalid fields?"},{"title":"Debugging a failing agent card","prompt":"My agent at https://beta.gogeta2.app seems to have issues with its A2A card — can you probe it and tell me exactly what's wrong, including reachability and signature validation?"}],"resultDescription":"Returns a validation score from 0 to 100 along with a structured list of issues found in the agent card, covering field completeness, declared skills, interface definitions, authentication configuration, cryptographic signature validity, and network reachability of the agent endpoint.","failureModes":["URL unreachable or returns non-200 status — reachability failure reported in issues","Agent card malformed JSON — parse error with details","A2A card version unsupported — version mismatch flagged","No agent card found at /.well-known/agent.json — card not found error","Signature verification fails — cryptographic issue flagged in results","Input URL missing or invalid format — 400 bad request"],"whenToPreferThis":"Choose this endpoint when you need to programmatically validate a peer agent's A2A Agent Card before integrating with it, onboarding it into a multi-agent system, or troubleshooting interoperability issues. It is purpose-built for A2A protocol compliance checking (v1.0 and v0.3) and provides a structured score plus actionable issues list — more thorough than a generic HTTP probe or MCP server check.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T11:04:19.344Z","isFirstParty":false,"canonicalSlug":"a2a-agent-card-check-d5579a69"}