License Search

{
  "asOf": "2026-10-11T14:39:36.266Z",
  "attribution": "License list: SPDX (CC0-1.0). Summaries: Choose a License (choosealicense.com, CC BY 3.0).",
  "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.",
  "listVersion": "3.29.0",
  "notChecked": [
    "licenses that are not on the SPDX list",
    "which of several similar licenses a project actually uses"
  ],
  "query": "gpl",
  "reasons": [
    "License list: SPDX (CC0-1.0). Summaries: Choose a License (choosealicense.com, CC BY 3.0).",
    "SPDX list version 3.29.0."
  ],
  "results": [
    {
      "deprecated": false,
      "fsfLibre": true,
      "licenseId": "GPL-2.0-only",
      "name": "GNU General Public License v2.0 only",
      "osiApproved": true
    },
    {
      "deprecated": false,
      "fsfLibre": true,
      "licenseId": "GPL-2.0-or-later",
      "name": "GNU General Public License v2.0 or later",
      "osiApproved": true
    }
  ],
  "source": "SPDX License List + Choose a License",
  "sourceUrl": "https://spdx.org/licenses/",
  "summary": "14 match(es) for \"gpl\"; top: GPL-2.0-only, GPL-2.0-or-later, GPL-3.0-only, GPL-3.0-or-later, AGPL-3.0-only, AGPL-3.0-or-later.",
  "totalMatches": 14,
  "verdict": "RESULTS"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://license-intel.x402tookit.com/license-search?limit=10&osiOnly=yes&query=gpl'

# 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://license-intel.x402tookit.com/license-search?limit=10&osiOnly=yes&query=gpl' \
  | 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%2Flicense-intel.x402tookit.com%2Flicense-search
const res = await pay("https://license-intel.x402tookit.com/license-search?limit=10&osiOnly=yes&query=gpl");
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://license-intel.x402tookit.com/license-search?limit=10&osiOnly=yes&query=gpl")
    print(res.status_code, res.text)