Coinflip

Last 30 days

Uptime

100%

Response time

296 ms typical, 296 ms slowest 5%

Last check

3 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://coinflip402.vercel.app/api/coinflip"

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%2Fcoinflip402.vercel.app%2Fapi%2Fcoinflip
const res = await pay("https://coinflip402.vercel.app/api/coinflip");
console.log(await res.json());

Example input

{}

Example output

{
  "message": "You flipped a coin and got heads!",
  "result": "heads",
  "timestamp": "2026-10-07T03:20:33.809Z"
}

Security scan

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

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