Identifier Lookup

{
  "asOf": "2026-10-11T08:43:39.332Z",
  "attribution": "Data: Wikidata, CC0 1.0 public domain dedication (https://www.wikidata.org/wiki/Wikidata:Licensing).",
  "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.",
  "matches": [
    {
      "description": "country in Western Europe and other continents (through its overseas territories in America, Africa and Oceania)",
      "id": "Q142",
      "label": "France",
      "url": "https://www.wikidata.org/wiki/Q142"
    }
  ],
  "normalised": "FR",
  "notChecked": [
    "identifiers Wikidata does not hold (absence here is not proof the identifier is unassigned)",
    "whether the identifier is currently valid at its issuing authority",
    "…1 more"
  ],
  "property": "P297",
  "reasons": [
    "Matched on the exact Wikidata statement value."
  ],
  "source": "Wikidata (CC0)",
  "sourceUrl": "https://www.wikidata.org",
  "summary": "ISO 3166-1 alpha-2 country code FR is Q142, France (country in Western Europe and other continents (through its overseas territories in America, Africa and Oceania)).",
  "type": "iso-alpha2",
  "valid": true,
  "value": "FR",
  "verdict": "MATCH_FOUND"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://wikidata-facts.x402tookit.com/identifier-lookup?type=iso-alpha2&value=FR'

# 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://wikidata-facts.x402tookit.com/identifier-lookup?type=iso-alpha2&value=FR' \
  | 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 $0.03 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.03" });
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 $0.03 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwikidata-facts.x402tookit.com%2Fidentifier-lookup
const res = await pay("https://wikidata-facts.x402tookit.com/identifier-lookup?type=iso-alpha2&value=FR");
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 $0.03 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.03"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://wikidata-facts.x402tookit.com/identifier-lookup?type=iso-alpha2&value=FR")
    print(res.status_code, res.text)