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santyvv-data Chain Nonce Lookup
x402
santyvv-data Chain Nonce Lookup is a paid API for AI agents from x402.santyvv.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Fetches the current nonce for a blockchain address or chain state via a pay-per-call API using x402/USDC micropayments
Price / call$0.01
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Pre-transaction nonce check
“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?”
Debug stuck pending transactions
“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?”
Smart contract deployment sequencing
“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.”
Technical details
Endpoint
GEThttps://x402.santyvv.com/api/chain/nonce?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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