{"slug":"agent402-tools-api-a2a-card-validate-520291","title":"Validate an A2A (Agent2Agent protocol) Agent Card","host":"agent402.tools","method":"POST","resource":"https://agent402.tools/api/a2a-card-validate","category":"other","description":"Validate an A2A (Agent2Agent protocol) Agent Card: required fields, skill shape, transport names, capability flags - spec v0.3 structural core. Returns errors, interop warnings, and a normalized summary (skills, interfaces, capabilities). Deterministic mini-A2A tooling - check a card before your age","price_listed":0.002,"price_asked":0.002,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":920,"reported_calls_30d":5,"reported_payers_30d":2,"networks":["algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=","eip155:10","eip155:1329","eip155:137","eip155:143","eip155:42161","eip155:42220","eip155:43114","eip155:4663","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","stellar:pubnet"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"card":{"capabilities":{"pushNotifications":false,"stateTransitionHistory":false,"streaming":true},"defaultInputModes":["application/json","text/plain"],"defaultOutputModes":["application/json"],"description":"A sample A2A Agent Card served as a static example for card tooling. This describes a fictional weather agent, not a live A2A endpoint.","name":"Sample Weather Agent","preferredTransport":"JSONRPC","protocolVersion":"0.3.0","provider":{"organization":"Example Org","url":"https://example.com"},"skills":[{"description":"Returns a city's 5-day forecast.","examples":["What is the weather in Paris this week?"],"id":"get-forecast","name":"Get weather forecast","tags":["weather","forecast"]}],"url":"https://example.com/a2a/v1","version":"1.0.0"}},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"card":{"description":"the Agent Card JSON (object or JSON string)","type":"object"}},"required":["card"]},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"errors":{"type":"array"},"summary":{"properties":{"name":{"type":"string"},"skillCount":{"type":"integer"}},"type":"object"},"valid":{"type":"boolean"},"warnings":{"type":"array"}},"required":["valid","errors","warnings","summary"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.002,"price_match":true,"latency_ms":920,"error":null}],"description_full":"Validate an A2A (Agent2Agent protocol) Agent Card: required fields, skill shape, transport names, capability flags - spec v0.3 structural core. Returns errors, interop warnings, and a normalized summary (skills, interfaces, capabilities). Deterministic mini-A2A tooling - check a card before your agent trusts it.","last_updated":"2026-09-14T18:43:59.645Z","schemes":["exact","upto"]}