{"uid":"cap_uo9RS4Ih_sevtdC3N4PYk","slug":"eip-712-typed-contract-builder-mcp-bfa77a19","name":"EIP-712 Typed Contract Builder MCP","description":"The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.","url":"https://api.m2mcent.com/eip712-typed-contract-builder-mcp/api/process?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"success":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_HIvIo3FzRbsiuKIU4Nn7w","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Builds EIP-712 typed structured data definitions and contract signing payloads for Ethereum-compatible smart contract interactions.","exampleAgentPrompt":"Build me an EIP-712 typed data structure for a token permit contract — the domain is 'MyToken' version '1' on chain ID 1, and the message should include owner address, spender address, value 1000, nonce 0, and deadline 9999999999.","exampleUseCases":[{"title":"Gasless token approval payload","prompt":"I need an EIP-712 typed signing payload for a token permit so my user can approve spending without paying gas — the domain name is 'DAI Stablecoin', version '1', chain ID 137, and the message fields are holder, spender, nonce 5, expiry 1800000000, and allowed true."},{"title":"Multisig transaction encoding","prompt":"Can you build me an EIP-712 typed data structure for a Gnosis Safe multisig transaction? Domain is 'GnosisSafe' on chain 1, and the message should include to, value, data, operation, safeTxGas, baseGas, gasPrice, gasToken, refundReceiver, and nonce 12."},{"title":"NFT marketplace order signing","prompt":"Generate an EIP-712 typed contract structure for an NFT marketplace order — domain name 'OpenSeaPort' version '1.1' on chain 1, with message fields for offerer, zone, offer array, consideration array, orderType, startTime, endTime, and salt."}],"resultDescription":"Returns a structured EIP-712 compliant typed data object including the domain separator definition, type definitions for all named types, and the encoded message payload ready for use with eth_signTypedData_v4 or similar wallet signing methods.","failureModes":["Malformed or incomplete data string input returns an error response","Invalid Ethereum address formats in the data payload cause parsing failures","Missing required domain fields (name, version, chainId) may result in incomplete output","Unsupported Solidity types in type definitions may not be encoded correctly","$0.10 USDC payment failure via x402 protocol blocks request processing"],"whenToPreferThis":"Choose this endpoint when you need to programmatically generate EIP-712 typed structured data for smart contract interactions, permit functions, multisig payloads, or any Ethereum signing workflow that requires structured type definitions. Prefer this over manual encoding when building Web3 agent workflows that must produce wallet-signable payloads without deep Solidity knowledge.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T12:36:26.846Z","isFirstParty":false,"canonicalSlug":"eip-712-typed-contract-builder-mcp-bfa77a19"}