{"uid":"cap_jdFqRgbA0OJIU-buCSM6J","slug":"agent-card-validator-a2a-by-synthora-8d5a8386","name":"Agent Card Validator (A2A) by Synthora","description":"Agent Card Validator (A2A): given an Agent Card URL or JSON, deterministically validates it against the A2A spec — required fields, skill schemas, endpoint reachability, security schemes, provider transparency — and returns a compatibility_score, schema_errors and warnings. The trust layer for the agent economy. Deterministic, Ed25519-signed. 0.01 USDC via x402 on Base. SYNTHORA.","url":"https://agentcard.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","description":"URL of the A2A Agent Card (.well-known/agent-card.json)"},"card":{"type":"object","description":"Or paste the Agent Card JSON directly"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"agent_card","result":{"signed":"ed25519","verdict":"buena","warnings":["falta campo recomendado: documentationUrl"],"skills_count":1,"schema_errors":[],"a2a_conformant":true,"endpoint_status":200,"pricing_declared":false,"security_declared":true,"compatibility_score":82}}},"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_-hyxDF9DR3Vx93m1svi4d","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":"Validates an A2A Agent Card URL or JSON against the A2A specification, returning a compatibility score, schema errors, and warnings","exampleAgentPrompt":"Can you validate my A2A agent card at https://myagent.example.com/.well-known/agent-card.json and tell me the compatibility score, any schema errors, and whether my security scheme and endpoint are properly configured?","exampleUseCases":null,"resultDescription":"Returns a compatibility_score (numeric, Ed25519-signed), a list of schema_errors identifying spec violations (missing required fields, malformed skill schemas, invalid security schemes), and warnings for soft issues like provider transparency gaps and unreachable endpoints.","failureModes":["Invalid or unreachable URL returns endpoint reachability error","Malformed JSON in card field returns parse error","Agent card missing required fields returns schema_errors with details","Network timeout on reachability check returns warning","Payment not processed (x402) returns 402 response"],"whenToPreferThis":"Use this endpoint when you need to deterministically validate an A2A Agent Card against the official spec before publishing or integrating it — especially when you need a signed compatibility score for trust verification, endpoint reachability confirmation, or skill schema compliance checking in the agent economy.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:37:38.267Z","isFirstParty":false}