X402 Echo

Last 30 days

Uptime

100%

Response time

220 ms typical, 220 ms slowest 5%

Last check

4 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/x402-echo" \
  -H "content-type: application/json" \
  -d '{"message":"hello agent"}'

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%2Fx402-echo
const res = await pay("https://x402.agentindex.world/x402-echo", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"message":"hello agent"}),
});
console.log(await res.json());

Example input

{
  "message": "hello agent"
}

Example output

{
  "network": "eip155:8453",
  "ok": true,
  "payer": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
  "price_atomic_usdc": "1000",
  "price_usdc": 0.001,
  "purpose": "x402-mainnet-conformance",
  "request": {
    "echo": {
      "hello": "agent"
    },
    "method": "POST"
  }
}

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