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On-Chain Nonce Lookup
x402
On-Chain Nonce Lookup is a paid API for AI agents from store.agentexchange.work, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Returns the current transaction nonce for a given EVM wallet address on a specified blockchain network
Price / call$0.001
Success—
StatusUnknown
How this service works
An address's transaction count (nonce) via eth_getTransactionCount — the next nonce to use and total outgoing transactions, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The read settlement and trading agents make to build and sequence transactions. Live public RPC; one paid call at $0.001.
Output
Returns a JSON object with the blockchain name, the queried wallet address, and the current integer nonce (transaction count) for that address on the specified chain.
Example use cases
Example prompt
“What's the current nonce for the wallet 0xAbCd1234...5678 on Base — I need it before I sign my next transaction.”
Technical details
Endpoint
GEThttps://store.agentexchange.work/chain/nonceWhen to prefer
Use this endpoint when an AI agent needs the current on-chain nonce for an EVM address before constructing or signing a transaction, especially without wanting to manage API keys or subscriptions. Pay-per-call USDC via x402 makes it ideal for autonomous agents with embedded wallets. Covers 6 major EVM networks including Base, Ethereum, Optimism, Arbitrum, Polygon, and Gnosis.
Side effects
- Invalid or malformed address (non-0x format) returns an error
- Unsupported chain name returns an error — only base, ethereum, optimism, arbitrum, polygon, gnosis are valid
- Payment failure via x402 prevents the call from completing
- Network or RPC unavailability for the target chain causes a timeout or error
- Address with no transactions may return nonce of 0, which could be misinterpreted
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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