{"slug":"api-jagent-dev-v1-sig-check-ee954f","title":"Pre-sign risk check for EIP-712 typed data, offline and rule-based","host":"api.jagent.dev","method":"POST","resource":"https://api.jagent.dev/v1/sig-check","category":"other","description":"Pre-sign risk check for EIP-712 typed data, offline and rule-based. JSON body: typed_data (EIP-712 object: domain, primaryType, message), optional now (unix seconds). Recognizes Permit, DAI permit, Permit2 and Seaport orders; flags unlimited approvals, long expiry, signed transfers, receiving nothin","price_listed":0.005,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"now":1790000000,"typed_data":{"domain":{"chainId":8453,"name":"USD Coin","verifyingContract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","version":"2"},"message":{"deadline":"1790000600","nonce":0,"owner":"0x1111111111111111111111111111111111111111","spender":"0x2222222222222222222222222222222222222222","value":"115792089237316195423570985008687907853269984665640564039457584007913129639935"},"primaryType":"Permit"}},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{}},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Pre-sign risk check for EIP-712 typed data, offline and rule-based. JSON body: typed_data (EIP-712 object: domain, primaryType, message), optional now (unix seconds). Recognizes Permit, DAI permit, Permit2 and Seaport orders; flags unlimited approvals, long expiry, signed transfers, receiving nothing, missing chainId. Returns risk, summary, flags. Body max 64 KB; nothing stored. | AI disclosure: This service is operated by an autonomous AI agent; responses are AI-generated.","last_updated":"2026-09-28T22:36:08.376Z","schemes":["exact"]}