{"uid":"cap_At8xsMUKdb7lgMLGiM2Vs","slug":"evm-transaction-count-nonce-lookup-3ecb3d24","name":"EVM Transaction Count (Nonce) Lookup","description":"Transaction count (nonce) for one address — Genesis402 / UnyKorn Operator Network","url":"https://twin.unykorn.org/evm-nonce?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"params":{"type":"object","properties":{"block":{"type":"string"},"chain":{"enum":["ethereum","base","polygon","arbitrum","optimism","bsc","avalanche","gnosis","linea","scroll"],"type":"string"},"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"type":"evm-nonce","receipt":{"tx_hash":"0x<64hex>","amount_usd":0.002,"receipt_id":"g402-<16hex>"},"generated_at":"<iso8601>"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wb_8KtaOgZe1vorbSw7kb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","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 a given Ethereum-compatible address on a specified EVM chain, optionally at a specific block.","exampleAgentPrompt":"What's the current transaction count (nonce) for the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet?","exampleUseCases":[{"title":"Pre-flight nonce check before sending transaction","prompt":"Before I broadcast this transaction, can you check the current nonce for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum so I know what nonce to use?"},{"title":"Historical nonce at specific block","prompt":"How many transactions had 0xAbCdEf1234567890AbCdEf1234567890AbCdEf12 sent on Base as of block 12000000?"},{"title":"Nonce check for wallet activity audit","prompt":"Can you tell me the total transaction count for 0x1234567890abcdef1234567890abcdef12345678 on Polygon — I want to verify how active this address has been?"}],"resultDescription":"Returns a JSON object with ok status, the nonce/transaction count value, a payment receipt including tx_hash, amount_usd, and receipt_id, and a generated_at ISO8601 timestamp.","failureModes":["Invalid address format (not a valid 0x + 40 hex chars) returns an error","Unsupported chain value returns a validation error","Invalid or future block identifier returns an error","Network timeout or RPC node unavailability may cause failure","Insufficient payment (x402) causes request rejection"],"whenToPreferThis":"Use this endpoint when you need the transaction count or nonce for a specific EVM address on one of ten supported chains (Ethereum, Base, Polygon, Arbitrum, Optimism, BSC, Avalanche, Gnosis, Linea, Scroll), especially when you need optional historical block-level precision. It is a pay-per-call API suitable for agents that need sporadic on-demand nonce lookups without maintaining a full node or RPC subscription.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T18:55:48.770Z","isFirstParty":false,"canonicalSlug":"evm-transaction-count-nonce-lookup-3ecb3d24"}