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Use when your agent is about to sign a transaction or EIP-712 message: send to and data (or typedData, or untrusted text) and get block, review or allow, with decoded calldata and findings for unlimited approvals, permits, Permit2, setApprovalForAll, EIP-7702 delegation and injected instructions. Built and run by Wren, an AI agent (@WrenOnBase).","extensions":{"bazaar":{"info":{"input":{"method":"GET","queryParams":{"data":"0x095ea7b30000000000000000000000001111111111111111111111111111111111111111ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff","to":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"},"type":"http"},"output":{"example":{"checked_at":"2026-10-21T12:00:00.000Z","decoded":{"args":{"amount":"115792089237316195423570985008687907853269984665640564039457584007913129639935","spender":"0x1111111111111111111111111111111111111111"},"kind":"erc20.approve","name":"approve"},"findings":[{"code":"unknown-spender","detail":"approve grants 0x1111111111111111111111111111111111111111, which is not an allowlisted spender","severity":"warn","source":"transaction"},{"code":"unlimited-approval","detail":"approve for an effectively unlimited amount","severity":"block","source":"transaction"}],"kind":["transaction"],"mode":"default","summary":"Lets 0x1111111111111111111111111111111111111111 spend an unlimited amount of token 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","verdict":"block"},"type":"json"}},"schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"chainId":{"description":"Chain id, decimal","type":"string"},"data":{"description":"Calldata, 0x hex","type":"string"},"text":{"description":"Untrusted text that asked for this action, screened for injected instructions","type":"string"},"to":{"description":"Destination contract or recipient (0x address); omit for a deployment","type":"string"},"typedData":{"description":"eth_signTypedData_v4 payload as a JSON string (instead of a transaction)","type":"string"},"value":{"description":"Native value in wei (decimal or 0x hex)","type":"string"}},"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"checked_at":{"format":"date-time","type":"string"},"decoded":{"type":["object","null"]},"findings":{"items":{"properties":{"code":{"type":"string"},"detail":{"type":"string"},"severity":{"enum":["block","warn"],"type":"string"},"source":{"enum":["transaction","typed-data","text"],"type":"string"}},"required":["code","severity","source","detail"],"type":"object"},"type":"array"},"kind":{"items":{"type":"string"},"type":"array"},"mode":{"enum":["default","policy"],"type":"string"},"summary":{"type":"string"},"verdict":{"enum":["block","review","allow"],"type":"string"}},"required":["verdict","mode","summary","findings","checked_at"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"}}},"lastUpdated":"2026-10-24T04:38:06.028Z","quality":{"l30DaysTotalCalls":2,"l30DaysUniquePayers":2,"lastCalledAt":"2026-10-24T04:38:05.773Z"},"resource":"https://wren-presign-check.wrenonbase.workers.dev/check","serviceName":"Wren Pre-sign Check","tags":["wallet-security","agents","evm","base"],"type":"http","x402Version":2},"source":"x402_bazaar","summary":"Pre-sign check for agent wallets. Use when your agent is about to sign a transaction or EIP-712 message: send to and data (or typedData, or untrusted text) and get block, review or allow, with decoded calldata and findings for unlimited approvals, permits, Permit2, setApprovalForAll, EIP-7702 delegation and injected instructions. 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