{"uid":"cap_ERD4agVKHxk-a4Ij6y3Ua","slug":"vextorium-evm-signature-verifier-e95eed40","name":"Vextorium EVM Signature Verifier","description":"Verify an Ethereum signature: a personal_sign (EIP-191) message or EIP-712 typed data. Recovers the signer address and, if you pass one, confirms it matches. Local computation; EIP-1271 contract wallets are not covered.","url":"https://api.vextorium.com/verificar-firma-evm-pago?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"firma":{"type":"string"},"mensaje":{"type":"string"},"direccion":{"type":"string"},"datos_eip712":{"type":"object"}}},"responseSchema":{"type":"json","example":{"tipo":"EIP-191 personal_sign","valida":true,"firmante":"0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf","hash_firmado":"0x517cc9957090f83459004d4980c16e723e44524c30d84175324025d957b0451a","direccion_esperada":"0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_n8LcTHscOyTYx1XpFVo4I","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Recovers the signer address from an Ethereum personal_sign (EIP-191) or EIP-712 typed data signature, and optionally confirms it matches an expected address.","exampleAgentPrompt":"Can you verify this Ethereum signature — the message was 'Hello World', the signature is 0xabc123...def, and I want to confirm it was signed by 0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf?","exampleUseCases":[{"title":"Authenticate user by wallet signature","prompt":"A user just signed the message 'Login to MyApp at timestamp 1717000000' with their MetaMask — the signature is 0xabc...def. Can you verify it and tell me which Ethereum address signed it?"},{"title":"Confirm ownership for NFT gating","prompt":"I need to check if wallet 0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf actually signed this access request. The signature is 0xdeadbeef...99 and the original message was 'Grant access to premium content'."},{"title":"Validate EIP-712 typed data signature","prompt":"We received an EIP-712 typed data signature from a user claiming to be 0xAbC...123 — here's the typed data object and signature. Can you recover the actual signer and check if it matches?"}],"resultDescription":"Returns a JSON object with the signature type (e.g. 'EIP-191 personal_sign'), a boolean indicating if the signature is valid, the recovered signer address, the signed hash, and the expected address if one was provided for comparison.","failureModes":["Malformed or invalid signature hex returns an error or null signer","Missing required 'firma' field causes a validation error","EIP-1271 contract wallet signatures are not supported and will not match correctly","Mismatch between message/typed data and signature yields valid:false","Incorrect EIP-712 domain or types object causes recovery failure"],"whenToPreferThis":"Choose this endpoint when you need fast, local cryptographic verification of Ethereum personal_sign or EIP-712 signatures without needing an Ethereum node connection. Ideal for authenticating users by wallet signature, verifying off-chain signed messages, or confirming signer identity in web3 workflows. Not suitable for EIP-1271 smart contract wallet signatures, which require on-chain calls.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T18:56:19.957Z","isFirstParty":false,"canonicalSlug":"vextorium-evm-signature-verifier-e95eed40"}