Ip Format

{
  "addressType": "documentation (RFC 3849)",
  "asOf": "2026-10-11T14:45:31.309Z",
  "binary": "0010000000000001:0000110110111000:0000000000000000:0000000000000000:0000000000000000:1111111100000000:0000000001000010:1000001100101001",
  "canonical": "2001:db8::ff00:42:8329",
  "compressed": "2001:db8::ff00:42:8329",
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "embeddedIpv4": null,
  "expanded": "2001:0db8:0000:0000:0000:ff00:0042:8329",
  "hex": "0x20010db8000000000000ff0000428329",
  "integer": "42540766411282592856904265327123268393",
  "ipv4Mapped": null,
  "ipv4MappedHex": null,
  "nat64": null,
  "notChecked": [
    "zone identifiers such as %eth0 (refused) and port numbers",
    "whether the address is assigned or reachable",
    "…2 more"
  ],
  "reasons": [
    "RFC 5952: lower case, leading zeros dropped, the longest run of two or more zero groups becomes ::, the first one if tied, and a single zero group is never shortened.",
    "No embedded IPv4 address."
  ],
  "reverseDns": "9.2.3.8.2.4.0.0.0.0.f.f.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa",
  "sixToFourPrefix": null,
  "source": "RFC 4291 and RFC 5952 text representations, RFC 6052 (NAT64), RFC 3056 (6to4), computed locally",
  "summary": "2001:db8::ff00:42:8329 (compressed per RFC 5952) = 2001:0db8:0000:0000:0000:ff00:0042:8329; documentation (RFC 3849).",
  "valid": true,
  "verdict": "CONVERTED",
  "version": 6
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://network-calc.x402tookit.com/ip-format?ip=2001%3A0db8%3A0000%3A0000%3A0000%3Aff00%3A0042%3A8329'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://network-calc.x402tookit.com/ip-format?ip=2001%3A0db8%3A0000%3A0000%3A0000%3Aff00%3A0042%3A8329' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

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

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fnetwork-calc.x402tookit.com%2Fip-format
const res = await pay("https://network-calc.x402tookit.com/ip-format?ip=2001%3A0db8%3A0000%3A0000%3A0000%3Aff00%3A0042%3A8329");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://network-calc.x402tookit.com/ip-format?ip=2001%3A0db8%3A0000%3A0000%3A0000%3Aff00%3A0042%3A8329")
    print(res.status_code, res.text)