{"uid":"cap_6Vzz88TC0YEoGUOhVh6Nc","slug":"arbitrum-nonce-lookup-b7ba4b9a","name":"Arbitrum Nonce Lookup","description":"Read the transaction count (nonce) of a 0x address on Arbitrum One, both confirmed and including pending transactions. Use to build the next transaction or to tell whether an address has ever sent anything; for its balance use arb_balance. A malformed address is rejected with 400, uncharged.","url":"https://agent-data-tools.revmesh2074.workers.dev/arb/nonce?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","examples":["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"],"description":"0x address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"chain":{"type":"string"},"nonce":{"type":"number"},"address":{"type":"string"},"chainId":{"type":"number"},"hasSent":{"type":"boolean"},"pendingNonce":{"type":"number"}}}}}}},"responseSchema":{"type":"json","example":{"chain":"Arbitrum One","nonce":1204,"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","chainId":42161,"hasSent":true,"pendingNonce":1204}},"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_z9CzL7-zQh7-RuazgKTSA","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 and pending nonce for an Ethereum address on Arbitrum One","exampleAgentPrompt":"What is the current nonce and pending nonce for the Arbitrum One address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — and has it ever sent a transaction?","exampleUseCases":[{"title":"Pre-flight nonce check before sending","prompt":"Before I broadcast my next transaction on Arbitrum, what nonce should I use for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045?"},{"title":"Detecting a stuck or pending transaction","prompt":"My Arbitrum transaction seems stuck — can you check the confirmed nonce vs pending nonce for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 so I can tell if there's an unconfirmed tx in the mempool?"},{"title":"Verifying wallet activity on Arbitrum","prompt":"Has the wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 ever sent any transactions on Arbitrum One, and if so how many?"}],"resultDescription":"Returns a JSON object with the wallet address, the chain name ('Arbitrum One'), the chainId (42161), the confirmed nonce (total transactions sent), the pending nonce (including mempool), and a boolean hasSent indicating whether the address has ever sent a transaction.","failureModes":["Invalid or malformed 0x address returns an error response","Address not found on Arbitrum (brand-new address with no activity) may return nonce 0 and hasSent false","Network or RPC issues on Arbitrum may cause timeouts or 5xx errors","Missing required 'address' query parameter returns a validation error","Payment failure (insufficient USDC balance) results in 402 response and no charge"],"whenToPreferThis":"Use this endpoint when you specifically need nonce data on Arbitrum One. It is pay-per-call with no API key required, making it ideal for one-off agent queries or low-volume automation. Prefer this over raw RPC calls when you need a clean, structured JSON response without managing your own node or provider credentials. For nonces on other chains (Base, Ethereum, Optimism, Polygon), use the corresponding sibling endpoints from the same Agent Data Tools service.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T12:44:42.714Z","isFirstParty":false,"canonicalSlug":"arbitrum-nonce-lookup-b7ba4b9a"}