IP info

Classify an IP address: version, public/private/loopback/link-local, integer form, and reverse-DNS (PTR) lookup.

Input

Field	Type	Description
ip *	string	IPv4 or IPv6 address

Example output

{
  "ip": "8.8.8.8",
  "version": 4,
  "scope": "public",
  "ptr": [
    "dns.google"
  ]
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/ip-info \
  -H "Content-Type: application/json" \
  -d '{"ip":"8.8.8.8"}'

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/ip-info", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "ip": "8.8.8.8"
  }),
});

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