DNS propagation check

Resolve the same DNS record against 4 public resolvers (Google, Cloudflare, Quad9, OpenDNS) in parallel; surface divergences. The first call you make after a DNS change — confirms the world sees what you intended.

Input

Field	Type	Description
host *	string	Hostname to resolve
type	string	Record type (default A)

Example output

{
  "host": "google.com",
  "type": "A",
  "consistent": true,
  "resolvers": [
    {
      "resolver": "8.8.8.8",
      "name": "Google",
      "records": [
        "142.250.80.46"
      ],
      "count": 1
    },
    {
      "resolver": "1.1.1.1",
      "name": "Cloudflare",
      "records": [
        "142.250.80.46"
      ],
      "count": 1
    },
    {
      "resolver": "9.9.9.9",
      "name": "Quad9",
      "records": [
        "142.250.80.46"
      ],
      "count": 1
    },
    {
      "resolver": "208.67.222.222",
      "name": "OpenDNS",
      "records": [
        "142.250.80.46"
      ],
      "count": 1
    }
  ],
  "queriedAt": "2026-06-19T20:00:00.000Z"
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/dns-propagation \
  -H "Content-Type: application/json" \
  -d '{"host":"google.com","type":"A"}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

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

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/dns-propagation", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "host": "google.com",
    "type": "A"
  }),
});

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

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