{"service":"KYACheck","version":"1.0.0","tagline":"Know-your-agent / counterparty check with a signed verdict, agent-callable.","description":"Know-your-agent (KYA) / counterparty check, made agent-callable. Before your agent pays, hires or trusts another agent, one x402 call screens that agent's wallet against the US Treasury OFAC SDN list - including the ~500 crypto addresses OFAC publishes, matched exactly - optionally screens its name/entity against the SDN and alternate-names lists, scores the wallet's on-chain risk (GoPlus address-security flags such as sanctioned, mixer, phishing, money laundering), and returns PASS / REVIEW / BLOCK with plain-language reasons. The verdict is signed as an LSO Receipt (secp256k1 / EIP-191) so the result can be verified independently and passed on-chain: ethers.verifyMessage must recover LSO's published signer. Compliance is checked off-chain; the verified result travels. $0.10 in USDC on Base or Solana via x402. Sources: OFAC SDN (refreshed daily), GoPlus, public RPC.","when_to_call":["Before paying, hiring or trusting another agent's wallet","Screen a counterparty wallet and name against OFAC, including OFAC-listed crypto addresses","Get a signed, independently verifiable compliance verdict to store or pass on-chain"],"price":"$0.10 USDC via x402 (Base or Solana)","payment":{"protocol":"x402","network":"base-mainnet","asset":"USDC","payTo":"0x52Ab53912D37759B2ad364f22dD06B16714b6C06"},"endpoints":{"/check?wallet=<address>&name=<optional>&chain=<optional>":"KYA verdict + signed receipt  $0.10","/signer":"LSO receipt signer address + how to verify (free)","/health":"status (free)"},"provider":"LoneStarOracle","catalog":"https://lonestaroracle.xyz","a2a":"https://lonestaroracle.xyz/.well-known/agent-card.json"}