{"uid":"cap_Q5tToUEgpgCPinOc-Crhm","slug":"evm-account-nonce-lookup-f334d4cf","name":"EVM Account Nonce Lookup","description":"Transaction count (nonce) for an address across 7 EVM chains, including pending vs confirmed to reveal stuck mempool transactions - agents need the correct nonce to build and send transactions and to detect pending txs. nonce, transaction count, account nonce, pending transactions, next nonce, tx count Accepts payment on Base or Solana — either network works.","url":"https://api.x402node.dev/chain/account-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":"ethereum, base (default), arbitrum, optimism, polygon, bsc, avalanche"},"address":{"type":"string","description":"Address (required)"}}}},"additionalProperties":false}}},"responseSchema":null,"example":{"request":{"chain":"base","address":"0x742d35Cc6634C0532925a3b844Bc9e7595f42bE1"},"response":{"note":"Transaction count (nonce) for an address. nonce = next confirmed tx index; pendingTxs = txs in mempool not yet mined. Agents need the right nonce to build transactions and detect stuck/pending txs.","_hint":"x402 paid endpoints for AI agents — x402node.dev (utilities) · cn402.com (Chinese culture)","chain":"base","nonce":0,"source":"rpc","address":"0x742d35Cc6634C0532925a3b844Bc9e7595f42bE1","pendingTxs":0,"pendingNonce":0}},"exampleRequest":{"chain":"base","address":"0x742d35Cc6634C0532925a3b844Bc9e7595f42bE1"},"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_j5YdZCuZwtHcNFfHjZegO","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the transaction count (nonce) for an Ethereum address across 7 EVM chains, distinguishing pending vs confirmed to reveal stuck mempool transactions and provide the correct next nonce for transaction construction.","exampleAgentPrompt":"What's the current confirmed and pending nonce for wallet address 0xAbC123... on Base — I want to make sure there are no stuck mempool transactions before I submit my next tx.","exampleUseCases":null,"resultDescription":"Returns the confirmed transaction count (nonce), the pending transaction count including mempool transactions, and the difference indicating any stuck or unconfirmed transactions for the queried address on the specified EVM chain.","failureModes":["Invalid or malformed Ethereum address returns a 4xx error","Unsupported chain identifier returns an error indicating valid chain options","RPC backend unavailability for a specific chain may return a 5xx error","Address with no transaction history returns nonce of 0 (not an error)","Payment not included or insufficient results in HTTP 402 response"],"whenToPreferThis":"Use this endpoint when an agent needs to construct, sign, or broadcast EVM transactions and must know the correct nonce to avoid rejection or collision. Also ideal for detecting stuck pending transactions in the mempool across 7 EVM chains, where a single-chain RPC call would be insufficient or setting up your own multi-chain RPC infrastructure is impractical.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:54:01.294Z","isFirstParty":false}