{"protocolVersion": "0.3.0", "name": "Agent Card Validator (A2A)", "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", "preferredTransport": "HTTP+JSON", "additionalInterfaces": [{"url": "https://agentcard.hergertsynthora.com/service", "transport": "HTTP+JSON"}, {"url": "https://agentcard.hergertsynthora.com/a2a", "transport": "JSONRPC"}], "version": "1.0.0", "provider": {"organization": "HERGERT SYNTHORA", "url": "https://hergertsynthora.com"}, "capabilities": {"streaming": false, "pushNotifications": false, "stateTransitionHistory": false}, "defaultInputModes": ["application/json"], "defaultOutputModes": ["application/json"], "skills": [{"id": "agentcard", "name": "agentcard", "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.", "tags": ["agentcard", "x402", "synthora", "m2m", "a2a"], "examples": ["{\"card\": {\"name\": \"Demo Agent\", \"description\": \"A2A agent card audit demo\", \"url\": \"https://example.org\", \"version\": \"1.0.0\", \"skills\": [{\"id\": \"chat\", \"name\": \"chat\", \"description\": \"conversational\"}]}}"], "inputModes": ["application/json"], "outputModes": ["application/json"], "inputSchema": {"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"}}}}], "securitySchemes": {"x402": {"type": "http", "scheme": "x402", "description": "HTTP 402 micropayment. 10000 atomic USDC on eip155:8453."}}, "security": [{"x402": []}], "x402": {"network": "eip155:8453", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "10000", "payTo": "0x10800a5a5B9d72251566EC651E862A8b4B427dE0", "resource": "https://agentcard.hergertsynthora.com/service"}, "mcp": {"endpoint": "https://agentcard.hergertsynthora.com/mcp", "transport": "http-jsonrpc"}}