{"protocolVersion": "0.3.0", "name": "Agent Notary", "description": "Agent Notary: proof-of-existence, proof-of-execution and proof-of-agreement for M2M deals. Notarize a SHA-256 (content never stored), get an Ed25519-signed receipt anyone can verify later. Deterministic, zero hallucination. $0.002 USDC via x402 on Base. SYNTHORA Trust Layer (EU). First 3 calls FREE per wallet - send header X-WALLET: 0x<addr>.", "url": "https://notary.hergertsynthora.com/service", "preferredTransport": "HTTP+JSON", "additionalInterfaces": [{"url": "https://notary.hergertsynthora.com/service", "transport": "HTTP+JSON"}, {"url": "https://notary.hergertsynthora.com/a2a", "transport": "JSONRPC"}], "version": "1.0.0", "provider": {"organization": "SYNTHORA", "url": "https://hergertsynthora.com"}, "capabilities": {"streaming": false, "pushNotifications": false, "stateTransitionHistory": false}, "defaultInputModes": ["application/json"], "defaultOutputModes": ["application/json"], "skills": [{"id": "notario", "name": "notario", "description": "Agent Notary: proof-of-existence, proof-of-execution and proof-of-agreement for M2M deals. Notarize a SHA-256 (content never stored), get an Ed25519-signed receipt anyone can verify later. Deterministic, zero hallucination. $0.002 USDC via x402 on Base. SYNTHORA Trust Layer (EU). First 3 calls FREE per wallet - send header X-WALLET: 0x<addr>.", "tags": ["notario", "x402", "synthora", "m2m", "a2a"], "examples": ["{\"op\": \"notarize\", \"content\": {\"deal\": \"agent A pays agent B 0.01 USDC for translation\"}}"], "inputModes": ["application/json"], "outputModes": ["application/json"], "inputSchema": {"type": "object", "properties": {"op": {"type": "string", "enum": ["notarize", "execution", "agreement", "verify"], "description": "operation"}, "content": {"description": "content to hash (notarize)"}, "hash": {"type": "string", "description": "sha256 hex (notarize/verify)"}, "input": {"description": "execution input (execution)"}, "output": {"description": "execution output (execution)"}, "party_a": {"type": "string"}, "party_b": {"type": "string"}, "terms": {"description": "agreement terms (agreement)"}, "receipt_id": {"type": "string", "description": "nt-.. (verify)"}}, "required": ["op"]}}], "securitySchemes": {"x402": {"type": "http", "scheme": "x402", "description": "HTTP 402 micropayment. 2000 atomic USDC on eip155:8453."}}, "security": [{"x402": []}], "x402": {"network": "eip155:8453", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "2000", "payTo": "0x6D9F318463168fF637b50E5b9a21392e97c7c167", "resource": "https://notary.hergertsynthora.com/service"}, "mcp": {"endpoint": "https://notary.hergertsynthora.com/mcp", "transport": "http-jsonrpc"}}