{"uid":"cap_Zst6xLpi6nLNjtZ2utbcu","slug":"base-permit-inspect-eip-2612-permit-signature-analyzer-1cc7b77f","name":"Base Permit Inspect — EIP-2612 Permit Signature Analyzer","description":"Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.","url":"https://signalharness.ai/api/agent/services/base_permit_inspect/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"request_json":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["No signature is requested, verified, or submitted."],"service_id":"base_permit_inspect","analysis_json":"{\"amount_atomic\":\"100\",\"deadline\":\"2000000000\",\"domain\":{\"chainId\":\"8453\"},\"expired_at_observation\":null,\"network_context\":{\"accepted_chain_ids\":[\"8453\",\"84532\"],\"deposit_transaction_type\":\"0x7e\",\"fee_model\":\"L2 execution plus caller-supplied L1 data/operator components\",\"protocol_family\":\"OP Stack\"},\"nonce\":\"1\",\"owner\":\"0x0000000000000000000000000000000000000001\",\"permit_type\":\"eip2612\",\"risk_flags\":[\"expiry_not_evaluated\"],\"spender\":\"0x0000000000000000000000000000000000000002\"}","evidence_scope":"caller_supplied_data","analyzed_network":"base"},"status":"succeeded","receipt":{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","usage":[],"status":"succeeded","network":"eip155:8453","artifacts":[],"endedAtMs":0,"latencyMs":0,"paymentId":"example-payment","receiptId":"example-receipt","requestId":"example-request","serviceId":"base_permit_inspect","executionId":"example-execution","startedAtMs":0,"amountAtomic":"15000","resultSha256":"e5063497cd1a68acd363cc4c3527fae5de8d7b04a12892aacd7199e906cfcf21","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.015","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":"$0.015/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_F04P3D0G5OXH6koSYSXIT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.015","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Analyzes and validates EIP-2612 permit signature JSON for the Base blockchain, returning decoded fields, risk flags, expiry status, and network context.","exampleAgentPrompt":"Can you inspect this EIP-2612 permit signature JSON for me and tell me if it has any risk flags, whether it's expired, and what the owner, spender, deadline, and nonce are on Base mainnet?","exampleUseCases":[{"title":"Pre-submission permit safety check","prompt":"Before I submit this USDC token permit to Base, can you analyze the EIP-2612 JSON and tell me if the deadline has passed, who the spender is, and whether there are any risk flags I should know about?"},{"title":"Decoding unknown permit signature","prompt":"I received this raw permit signature JSON and I'm not sure what it authorizes — can you decode it and tell me the permit type, owner, spender, nonce, and amount on Base?"},{"title":"DeFi agent permit validation workflow","prompt":"As part of my DeFi automation, check this EIP-2612 permit JSON on Base chain and confirm it's not expired and has no risk flags before I proceed with the transaction."}],"resultDescription":"Returns a structured analysis JSON containing the decoded permit fields (amount_atomic, deadline, nonce, owner, spender, domain chainId), permit type (e.g. eip2612), expiry status, risk flags (e.g. expiry_not_evaluated), network context (accepted chain IDs, fee model, transaction type, protocol family), evidence scope, and analyzed network name. Also includes a receipt with service ID, payment ID, execution metadata, and a SHA-256 hash of the result.","failureModes":["Malformed or invalid permit JSON results in a parse error","Missing required permit fields returns incomplete analysis","Unsupported chain ID may result in unknown network context","Permit with future deadline marked as expiry_not_evaluated if deadline evaluation is skipped","No signature provided returns warning: 'No signature is requested, verified, or submitted'"],"whenToPreferThis":"Use this endpoint when you need to programmatically decode and risk-assess an EIP-2612 permit signature specifically on Base (chainId 8453) or Base Sepolia. It is purpose-built for Base network permit inspection, returning structured risk flags and network-aware context. Prefer it over generic ABI decoders when you need expiry analysis, risk flagging, and OP Stack fee model context in a single call for $0.015 USDC.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:02:35.305Z","isFirstParty":false}