{"uid":"cap_AmOzcDRkRj4Wk4rliWZUV","slug":"santyvv-data-ethereum-address-nonce-lookup-07e3b91b","name":"santyvv-data: Ethereum Address Nonce Lookup","description":"Transaction count (next nonce) of an address","url":"https://santyvv-x402.santyvv1993.workers.dev/api/chain/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","properties":{}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_s9-fYLuJwBy8QszvbecDK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","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 (next nonce) for a given Ethereum address, useful for constructing transactions or detecting account activity.","exampleAgentPrompt":"What is the current nonce (transaction count) for Ethereum address 0xAbCd...1234? I need it to build my next transaction correctly.","exampleUseCases":[{"title":"Pre-transaction nonce check","prompt":"Before I send a transaction from 0xDead...Beef, what nonce should I use so it doesn't get rejected or stuck?"},{"title":"Detect account activity level","prompt":"How many transactions has the address 0xAbc...123 ever sent? I want to know if it's a fresh wallet or an active one."},{"title":"Debug stuck transaction","prompt":"My transaction from 0x1234...5678 seems stuck — can you check the current nonce on-chain so I can figure out if there's a pending transaction blocking it?"}],"resultDescription":"Returns the integer transaction count (nonce) for the queried Ethereum address — this is the number of confirmed transactions sent from that address, which equals the nonce value to use for the next transaction.","failureModes":["Invalid or malformed address returns an error response","Address not found on chain returns nonce of 0 (indistinguishable from a new address)","Network or RPC backend outage returns a 5xx error","Missing or incorrect query parameter causes a 400 bad request"],"whenToPreferThis":"Use this endpoint when you need the current nonce for an Ethereum address to construct or sign a transaction, or when you want a quick read-only lookup of how many transactions an address has sent. It is a lightweight, pay-per-call API suited for agents that need on-demand nonce resolution without running their own Ethereum node.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T12:53:39.994Z","isFirstParty":false,"canonicalSlug":"santyvv-data-ethereum-address-nonce-lookup-07e3b91b"}