{"uid":"cap_dM_iKkA8bIE3HSmBXlUim","slug":"on-chain-nonce-lookup-755ac59e","name":"On-Chain Nonce Lookup","description":"An address's transaction count (nonce) via eth_getTransactionCount — the next nonce to use and total outgoing transactions, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The read settlement and trading agents make to build and sequence transactions. Live public RPC; one paid call at $0.001.","url":"https://store.agentexchange.work/chain/nonce","method":"GET","headers":{},"bodySchema":{"type":"object","$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"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"chain":{"type":"string","description":"base|ethereum|optimism|arbitrum|polygon|gnosis (default base)"},"address":{"type":"string","description":"Account address (0x...)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"nonce":{"type":"number"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.001/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_j9s18TFuON34NEAS4qsUz","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current transaction nonce for a given EVM wallet address on a specified blockchain network","exampleAgentPrompt":"What's the current nonce for the wallet 0xAbCd1234...5678 on Base — I need it before I sign my next transaction.","exampleUseCases":null,"resultDescription":"Returns a JSON object with the blockchain name, the queried wallet address, and the current integer nonce (transaction count) for that address on the specified chain.","failureModes":["Invalid or malformed address (non-0x format) returns an error","Unsupported chain name returns an error — only base, ethereum, optimism, arbitrum, polygon, gnosis are valid","Payment failure via x402 prevents the call from completing","Network or RPC unavailability for the target chain causes a timeout or error","Address with no transactions may return nonce of 0, which could be misinterpreted"],"whenToPreferThis":"Use this endpoint when an AI agent needs the current on-chain nonce for an EVM address before constructing or signing a transaction, especially without wanting to manage API keys or subscriptions. Pay-per-call USDC via x402 makes it ideal for autonomous agents with embedded wallets. Covers 6 major EVM networks including Base, Ethereum, Optimism, Arbitrum, Polygon, and Gnosis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:48:55.505Z","isFirstParty":false}