{"schema":"https://agentcard.googleapis.com/a2a/v1/agent-card.json","name":"SENTINEL","version":"1.0.0","description":"Pre-execution transaction safety oracle for autonomous AI agents. Call SENTINEL before signing any on-chain transaction and receive a Signed SAFE / UNSAFE / UNKNOWN verdict (ed25519). Paid per call via x402 (USDC on Base).","url":"https://sentinel-agent.dev/v1/guard","provider":{"organization":"Ivar Garcés — Bogotá, Colombia","url":"https://sentinel-agent.dev","siblings":["https://api.veradata.dev","https://api.intelica.dev","https://api.trustboost.dev"]},"capabilities":{"streaming":false,"pushNotifications":false,"x402Payment":true},"authentication":{"schemes":["x402"]},"skills":[{"id":"guard","name":"Transaction Safety Check","description":"Returns SAFE/UNSAFE/UNKNOWN verdict + signed receipt before an agent signs a tx. Checks contract security (GoPlus) and simulates the call (Alchemy).","tags":["security","safety","x402","web3","agent-safety"],"inputModes":["application/json"],"outputModes":["application/json"]}],"pricing":{"endpoint":"/v1/guard","price_usdc":0.005,"network":"base","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","payTo":"0xCf1d31020A7915421f6d66B9835Dcb6f422337E7","scheme":"x402"},"documentation":"https://sentinel-agent.dev/llms.txt","mcp":"https://sentinel-agent.dev/mcp"}