{"uid":"cap_lIFHmXfMDPJUJ1m_FnE12","slug":"unprice-nonce-lookup-26012e5e","name":"Unprice Nonce Lookup","description":"Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC receipts, and recent wallet statements.","url":"https://volkov.evgeny.m2.fvds.ru/pay/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,"address":"0xdD1729943bf7C408456cef52886ad12B05B57dC2","network":"base"}},"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_-RgpPulkotQCDRmFPhy5u","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 a nonce value associated with a blockchain address on the Base network, used for payment authentication with the x402 protocol.","exampleAgentPrompt":"What is the current nonce for wallet address 0xdD1729943bf7C408456cef52886ad12B05B57dC2 on the Base network so I can authorize an x402 micropayment?","exampleUseCases":[{"title":"Authorize x402 micropayment request","prompt":"Before I send an x402 payment, get me the current nonce for my Base wallet 0xdD1729943bf7C408456cef52886ad12B05B57dC2 so I can sign the transaction correctly."},{"title":"Verify wallet nonce before signing","prompt":"Fetch the nonce for address 0xabc1234567890def1234567890abcdef12345678 on Base — I need it to make sure my next signed message doesn't get rejected."},{"title":"Automate pay-per-request API calls","prompt":"My agent needs to automatically retrieve the nonce for my wallet 0xdD1729943bf7C408456cef52886ad12B05B57dC2 each time before making a paid API call through the x402 protocol on Base."}],"resultDescription":"Returns a JSON object containing a numeric nonce, the queried wallet address, and the network name (e.g. 'base'). Example: {\"nonce\": 0, \"address\": \"0xdD1729943bf7C408456cef52886ad12B05B57dC2\", \"network\": \"base\"}.","failureModes":["Invalid or malformed wallet address returns an error response","Missing address parameter may return default or error","Network unavailability causes timeout or 5xx error","Payment of $0.001 USDC not processed correctly results in 402 response"],"whenToPreferThis":"Use this endpoint when you need to retrieve the current nonce for a Base network wallet address as part of the x402 pay-per-request authentication flow, particularly before signing micropayment transactions. Prefer this when building agents that need to automate x402 payment sequences on the Base blockchain.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T00:49:49.590Z","isFirstParty":false,"canonicalSlug":"unprice-nonce-lookup-26012e5e"}