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Base Erc20 Balance

by base-erc20-balance in Onchain & crypto

x402 APIPassing, checked 2 h ago

ERC20 token balance for a wallet on Base mainnet - balanceOf() and decimals() batched into one Multicall3 round trip.

POST https://x402.agentindex.world/base/erc20-balance

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
46 ms typical, 46 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 POST "https://x402.agentindex.world/base/erc20-balance" \
  -H "content-type: application/json" \
  -d '{"token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","wallet":"0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d"}'
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 $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402.agentindex.world%2Fbase%2Ferc20-balance
const res = await pay("https://x402.agentindex.world/base/erc20-balance", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","wallet":"0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d"}),
});
console.log(await res.json());

Example input

{
  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "wallet": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d"
}

Example output

{
  "balance": 0.027892,
  "balance_raw": "27892",
  "decimals": 6,
  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "wallet": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d"
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed40246 ms$0.003
7 h agoPassed40256 ms$0.003