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Ethereum Wallet Transaction Nonce Lookup
x402
Ethereum Wallet Transaction Nonce Lookup is a paid API for AI agents from skills.onesource.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Returns the next transaction nonce (eth_getTransactionCount) for any Ethereum-compatible wallet address at a given block
Price / call$0.003
Success—
StatusUnknown
How this service works
Next transaction nonce for any Ethereum wallet via eth_getTransactionCount - how many txs it has sent
Output
Returns a hex-encoded nonce value (e.g. '0x1a') representing how many transactions the wallet has sent, plus endpoint and request ID metadata. The nonce indicates the next sequence number to use for a new transaction from that address.
Example use cases
Example prompt
“What's the current nonce for Ethereum wallet 0x1234567890123456789012345678901234567890 on mainnet at the latest block — how many transactions has it sent so far?”
Technical details
Endpoint
GEThttps://skills.onesource.io/api/chain/nonce/:addressWhen to prefer
Use this endpoint when you need the transaction nonce for an Ethereum-compatible wallet address, especially when constructing or broadcasting transactions, auditing wallet activity, or checking how many transactions an address has sent. Prefer this over raw RPC calls when you want a managed, pay-per-use API with multi-network support including Base, Avalanche, and testnets.
Side effects
- Invalid address format (not a 40-char hex with 0x prefix) returns a validation error
- Unsupported network name returns an error (must be one of: ethereum, sepolia, avax, megaeth, megaeth-testnet, base)
- Invalid block tag or number returns an RPC error
- Address with no transaction history returns nonce 0x0
- RPC node unavailability may cause timeout or 5xx response
- Payment failure (402) if USDC balance is insufficient
Input
{
"block": "latest",
"address": "0x1234567890123456789012345678901234567890",
"network": "ethereum"
}Output
{
"data": {
"nonce": "0x0"
},
"meta": {
"endpoint": "/api/chain/nonce/0x1234567890123456789012345678901234567890",
"request_id": "033c36ddc19cda01"
}
}Tags
x402
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