{"uid":"cap_mvK1zIu6UNffs4VN6Mf1n","slug":"santyvv-data-chain-nonce-lookup-53111eb1","name":"santyvv-data Chain Nonce Lookup","description":"Market and on-chain data, paid per call in USDC on Base through the x402 protocol. No accounts, no API keys. Sources are public data providers; the value added here is keyless access, edge caching, multi-source fallback and normalised responses.","url":"https://x402.santyvv.com/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_1Hk6vhbtRgiII0J7GnG8i","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":"Fetches the current nonce for a blockchain address or chain state via a pay-per-call API using x402/USDC micropayments","exampleAgentPrompt":"What's the current on-chain nonce for my wallet address 0xAbC...123 on Base? I need it to sequence my next transaction correctly.","exampleUseCases":[{"title":"Pre-transaction nonce check","prompt":"Before I send a transaction from 0xAbC...123, can you grab the current nonce for that address on Base so I can set the sequence number correctly?"},{"title":"Debug stuck pending transactions","prompt":"My transaction seems stuck — can you look up the current on-chain nonce for 0xDef...456 on Base so I can figure out if there's a gap causing the delay?"},{"title":"Smart contract deployment sequencing","prompt":"I'm about to deploy a series of contracts from 0x789...abc on Base — fetch the current nonce so I can pre-compute the deployment addresses for each step."}],"resultDescription":"Returns the current nonce (transaction count) for the queried blockchain address or chain state, normalized into a consistent response format. The nonce represents the number of confirmed transactions sent from the address, usable directly for constructing the next transaction.","failureModes":["Invalid or missing address parameter returns an error response","Chain or RPC backend unavailable causes a 5xx or timeout","x402 payment failure (insufficient USDC balance or payment not accepted) results in a 402 response with no data","Rate limits or upstream provider issues may cause intermittent failures","Querying an address with no transaction history may return nonce of 0, which is valid but could be misread as an error"],"whenToPreferThis":"Use this endpoint when you need a quick, keyless nonce lookup for a blockchain address on Base (or supported chains) without setting up an RPC provider or API key. It is ideal for agents that need on-chain account state for transaction construction and want to pay per-call in USDC via x402 rather than manage subscriptions or credentials. Prefer it over raw RPC calls when you want normalized, edge-cached responses with multi-source fallback.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:36:37.345Z","isFirstParty":false,"canonicalSlug":"santyvv-data-chain-nonce-lookup-53111eb1"}