{"uid":"cap_h7Cdatr0TqJcYcv9nDMXK","slug":"wallet-nonce-lookup-base-ethereum-314ea724","name":"Wallet Nonce Lookup - Base & Ethereum","description":"Pay-per-call x402 APIs for AI agents: OpenAI-compatible LLM chat, perp funding and arbitrage spreads, crypto prices, gas, FX, Solana SPL mint audit, token price by contract, x402 delivery-receipt verification, web search, clean page extraction, batch tools and deterministic code-security scanning. USDC on Base or Solana, no signup, no API key, from $0.0001 a call.","url":"https://scanpay-edge.alextaghiashvili.workers.dev/api/v1/nonce?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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"},"network":{"enum":["base","ethereum"],"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"nonce":7,"address":"0x1E04f5046500e5369E17AF993Dc60aC29D83efc9","network":"base","product":"scanpay.nonce","chain_id":"eip155:8453","price_usd":0.002,"next_nonce":7}},"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_Xn2Ov3NZwjeoJe6_8hRjB","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 next transaction nonce (eth_getTransactionCount) for any EVM wallet address on Base or Ethereum mainnet.","exampleAgentPrompt":"What's the current transaction nonce for wallet 0x1E04f5046500e5369E17AF993Dc60aC29D83efc9 on Base so I can sign my next transaction correctly?","exampleUseCases":[{"title":"Pre-sign nonce check for DeFi bot","prompt":"Before I broadcast this swap transaction, get me the correct next nonce for 0xAbCd1234...5678 on Base so the transaction doesn't get stuck or replaced."},{"title":"Wallet transaction count audit","prompt":"How many transactions has 0x1E04f5046500e5369E17AF993Dc60aC29D83efc9 sent on Ethereum mainnet so far? I want to verify the nonce count."},{"title":"Multi-step transaction sequencing","prompt":"I'm about to send 3 transactions back-to-back from 0xDead...Beef on Base — can you fetch the current nonce so I can assign sequential nonces to each one?"}],"resultDescription":"Returns a JSON object containing the EVM address queried, the network (e.g. 'base' or 'ethereum'), the chain ID in CAIP-2 format (e.g. 'eip155:8453'), the current nonce (transaction count), the next_nonce to use for the next transaction, and the price_usd of the call.","failureModes":["Invalid or malformed EVM address returns an error or unexpected result","Unsupported network parameter causes a failure response","RPC node downtime or congestion may delay or fail the response","Missing required address parameter results in a 400-level error","Payment failure (insufficient USDC balance for x402 micropayment) blocks the request"],"whenToPreferThis":"Use this endpoint when you need a quick, reliable nonce lookup for an EVM address on Base or Ethereum before constructing or signing a transaction. It is ideal for agents orchestrating on-chain transactions, DeFi bots, or wallet tooling that needs the current eth_getTransactionCount without managing their own RPC connection. Prefer this over a general RPC provider when you want a pay-per-call model with no API key setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-01T06:45:14.428Z","isFirstParty":false,"canonicalSlug":"wallet-nonce-lookup-base-ethereum-314ea724"}