{"name":"TxPreflight","version":"0.6.0","protocol":"x402","resource":"https://agent-sign-guard-main-production.up.railway.app/risk-check","method":"POST","description":"Spend a fraction of a cent to independently screen a Base transaction before risking onchain value. TxPreflight returns deterministic ALLOW, REVIEW, or BLOCK with ERC20/Permit2 approval analysis, direct OFAC SDN EVM screening, malformed-calldata detection, and current-state Base simulation.","price":"$0.003","payment_network":"eip155:8453","content_type":"application/json","tags":["evm-security","wallet-security","pre-sign-security","transaction-risk","transaction-simulation","approval-check","permit2-security","agent-wallet","fraud-prevention","base","permit2","x402"],"free_precheck":{"resource":"https://agent-sign-guard-main-production.up.railway.app/classify","method":"POST","purpose":"Free structural pre-check with action/token/spender/recipient/amount hints and a concrete reason to escalate; no security verdict, sanctions result, or simulation."},"when_to_call":["immediately before signing or broadcasting an unsigned Base transaction","before ERC20 approvals or token transfers","before Permit2 permission or transfer execution","before setApprovalForAll","before executing calldata proposed by another app, tool, contract, or agent"],"agent_policy":{"ALLOW":"No configured rule requires intervention; continue only if local policy also allows.","REVIEW":"Pause autonomous signing and apply additional policy or review.","BLOCK":"Do not sign automatically."},"capabilities":["pre-sign transaction screening","ERC20 approval risk","unlimited approval detection","Permit2 risk detection","OFAC SDN EVM screening","Base EVM transaction simulation"],"openapi":"https://agent-sign-guard-main-production.up.railway.app/openapi.json","llms":"https://agent-sign-guard-main-production.up.railway.app/llms.txt","transparency":"https://agent-sign-guard-main-production.up.railway.app/transparency"}