{"uid":"cap_3i2IDQuDKdan3nRfC-QYx","slug":"base-blockchain-address-nonce-lookup-972c988a","name":"Base Blockchain Address Nonce Lookup","description":"Pay-per-call utility APIs in USDC on Base: Hebrew calendar and text tools, Shabbat times, Base token control-risk screen and address summary, plus finance arithmetic tools. General information and arithmetic only; not investment, tax or legal advice and not a recommendation to buy, sell or hold anything.","url":"https://heb-utils-x402.hebutils-api.workers.dev/base-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":{"address":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"nonce":0}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_WzILgHxzm2ZbmXt9Bde5C","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","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 Base blockchain address","exampleAgentPrompt":"What is the current nonce for the Base address 0xAbC123...? I need it before I send my next transaction.","exampleUseCases":[{"title":"Pre-transaction nonce check","prompt":"Before I submit a transaction from wallet 0x1234567890abcdef1234567890abcdef12345678 on Base, can you fetch its current nonce so I know what value to use?"},{"title":"Wallet activity audit","prompt":"How many transactions has the Base address 0xDeadBeef00000000000000000000000000000001 sent so far? Get me its nonce."},{"title":"Pending transaction collision avoidance","prompt":"I'm about to sign a replacement transaction — can you look up the current nonce for 0xaabbccddeeff00112233445566778899aabbccdd on Base so I don't accidentally reuse one?"}],"resultDescription":"Returns a JSON object containing a single integer field 'nonce' representing the current transaction count (nonce) for the queried Base address, indicating how many transactions the address has sent.","failureModes":["Missing or invalid address parameter returns an error or unexpected result","Non-checksummed or malformed Ethereum address may fail","Address with zero transactions returns nonce of 0, which may be confused with an error","Network or worker downtime may cause 5xx errors","Payment failure via x402 protocol results in 402 response before any data is returned"],"whenToPreferThis":"Use this endpoint when you need the current on-chain nonce for a Base blockchain address, particularly before constructing or signing a transaction to avoid nonce collisions. Prefer this over generic RPC calls when you want a simple pay-per-call REST API without running your own Base node or managing RPC provider credentials.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T12:30:04.351Z","isFirstParty":false,"canonicalSlug":"base-blockchain-address-nonce-lookup-972c988a"}