Http Headers

Last 30 days

Uptime

100%

Response time

225 ms typical, 225 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 POST "https://agent402.tools/api/http-headers" \
  -H "content-type: application/json" \
  -d '{"url":"https://agent402.tools"}'

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%2Fagent402.tools%2Fapi%2Fhttp-headers
const res = await pay("https://agent402.tools/api/http-headers", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"url":"https://agent402.tools"}),
});
console.log(await res.json());

Example input

{
  "url": "https://agent402.tools"
}

Example output

{
  "fetchedAt": "2026-06-19T22:00:00.000Z",
  "finalUrl": "https://agent402.tools/",
  "headers": {
    "content-type": "text/html; charset=utf-8",
    "server": "railway-hikari",
    "x-content-type-options": "nosniff"
  },
  "httpVersion": null,
  "redirected": false,
  "security": {
    "findings": [
      {
        "header": "HSTS",
        "present": true,
        "value": "max-age=63072000; includeSubDomains; preload"
      },
      {
        "header": "XCTO",
        "present": true,
        "value": "nosniff"
      }
    ],
    "score": 100,
    "warnings": [
      "info: Server header names the platform (railway-hikari); also visible from DNS, low value to hide"
    ]
  },
  "status": 200,
  "statusText": "OK",
  "url": "https://agent402.tools/"
}

Security scan

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

Recent checks