{"slug":"402-com-tr-api-x402-b20-permit-81c336","title":"🆕 Every B20 has ERC-2612 permit built in — approve a spender by signature instea","host":"402.com.tr","method":"GET","resource":"https://402.com.tr/api/x402/b20-permit","category":"market","description":"🆕 Every B20 has ERC-2612 permit built in — approve a spender by signature instead of a transaction. Reads exactly what an agent needs to build a valid permit: the token's DOMAIN_SEPARATOR, the owner's current nonce (so the signed payload can't be rejected/replayed), and the EIP-712 domain/type struc","price_listed":0.03,"price_asked":0.03,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":729,"reported_calls_30d":2,"reported_payers_30d":2,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","pathParams":{},"queryParams":{"address":"0xb20000000000000000000186a08e781c38059eec","owner":"0x973a31858f4d2125f48c880542da11a2796f12d6"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object"},"queryParams":{"properties":{"address":{"description":"B20 token address","type":"string"},"owner":{"description":"Owner wallet (for the nonce, optional)","type":"string"}},"required":["address"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.03,"price_match":true,"latency_ms":729,"error":null}],"description_full":"🆕 Every B20 has ERC-2612 permit built in — approve a spender by signature instead of a transaction. Reads exactly what an agent needs to build a valid permit: the token's DOMAIN_SEPARATOR, the owner's current nonce (so the signed payload can't be rejected/replayed), and the EIP-712 domain/type struct. Read-only — signs nothing.","last_updated":"2026-09-19T15:57:12.291Z","schemes":["exact"]}