{"uid":"cap_fkiDE85dS4aj-Dt0RTRaQ","slug":"bot-bazaar-eip-712-domain-hash-checker-894431fa","name":"Bot Bazaar EIP-712 Domain Hash Checker","description":"Compute the exact Keccak-256 EIP712Domain typeHash and domainSeparator for Base USDC or any custom EIP-712 contract domain.","url":"https://bot-bazaar.fly.dev/v1/x402/eip712-domain-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"verifying_contract":{"type":"string","description":"Verifying contract 0x address on Base"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_0lYiv6ONZaaZ10IlkX8O9","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the exact Keccak-256 EIP712Domain typeHash and domainSeparator for Base USDC or any custom EIP-712 contract domain by verifying contract address.","exampleAgentPrompt":"Can you compute the EIP712Domain typeHash and domainSeparator for the Base USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913?","exampleUseCases":[{"title":"Verify USDC permit signing setup","prompt":"What is the exact EIP-712 domainSeparator and typeHash for the USDC contract on Base at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913? I need to make sure my permit signatures will be valid."},{"title":"Debug custom EIP-712 contract domain","prompt":"I have a custom token contract at 0x4200000000000000000000000000000000000006 on Base — can you compute its EIP712Domain typeHash and domainSeparator so I can check why my structured data signatures are failing?"},{"title":"Audit EIP-712 domain configuration","prompt":"Can you check the EIP712Domain typeHash and domainSeparator for the contract at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on Base? I want to confirm the domain is configured correctly before deploying my signing code."}],"resultDescription":"Returns the computed Keccak-256 EIP712Domain typeHash and domainSeparator for the specified Base contract, enabling verification of EIP-712 structured data signing parameters. Includes the canonical domain components used to derive these values.","failureModes":["Invalid or malformed 0x contract address returns an error","Contract not deployed on Base network yields no bytecode result","Network or RPC issues may cause lookup failures","EOA address (non-contract) may return empty or unexpected domain data"],"whenToPreferThis":"Use this endpoint when you need to programmatically verify or compute EIP-712 domain hashes for smart contracts deployed on Base, especially for permit-style token approvals or signature validation workflows. Prefer this over manual computation when working with Base USDC or custom EIP-712 contracts and needing on-chain verified values rather than locally derived ones.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T19:06:45.645Z","isFirstParty":false,"canonicalSlug":"bot-bazaar-eip-712-domain-hash-checker-894431fa"}