Chain Nonce

Last 30 days

Uptime

100%

Response time

256 ms typical, 256 ms slowest 5%

Last check

2 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://api.onesource.io/api/chain/nonce/:address?network=ethereum"

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.03:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.onesource.io%2Fapi%2Fchain%2Fnonce%2F%3Aaddress
const res = await pay("https://api.onesource.io/api/chain/nonce/:address?network=ethereum");
console.log(await res.json());

Example input

{
  "network": "ethereum"
}

Example output

{
  "data": {
    "nonce": "0x4d2"
  },
  "meta": {
    "cost_usdc": "0.001",
    "endpoint": "/api/chain/nonce/0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
    "payment_chain": "base",
    "payment_token": "USDC",
    "request_id": "00000000abcdef01"
  }
}

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