License Lookup

{
  "asOf": "2026-10-11T14:39:35.738Z",
  "attribution": "License list: SPDX (CC0-1.0). Summaries: Choose a License (choosealicense.com, CC BY 3.0).",
  "conditions": [
    "License and copyright notice",
    "State changes"
  ],
  "degraded": false,
  "deprecated": 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.",
  "family": "permissive",
  "fsfLibre": true,
  "licenseId": "Apache-2.0",
  "limitations": [
    "Trademark use",
    "Liability",
    "…1 more"
  ],
  "listVersion": "3.29.0",
  "name": "Apache License 2.0",
  "notChecked": [
    "the full license text and any project-specific exceptions or dual-licensing",
    "legal effect in your jurisdiction",
    "…1 more"
  ],
  "osiApproved": true,
  "overview": "A permissive license whose main conditions require preservation of copyright and license notices. Contributors provide an express grant of patent rights. Licensed works, modifications, and larger work…",
  "permissions": [
    "Commercial use",
    "Modification",
    "…3 more"
  ],
  "reasons": [
    "License list: SPDX (CC0-1.0). Summaries: Choose a License (choosealicense.com, CC BY 3.0).",
    "Identifier is current on the SPDX list.",
    "…1 more"
  ],
  "reference": "https://spdx.org/licenses/Apache-2.0.html",
  "seeAlso": [
    "https://www.apache.org/licenses/LICENSE-2.0",
    "https://opensource.org/license/apache-2.0"
  ],
  "source": "SPDX License List + Choose a License",
  "sourceUrl": "https://spdx.org/licenses/",
  "summary": "Apache-2.0 is \"Apache License 2.0\", OSI approved, FSF libre; family: permissive.",
  "verdict": "FOUND"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://license-intel.x402tookit.com/license-lookup?id=Apache-2.0'

# 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-lookup?id=Apache-2.0' \
  | 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-lookup
const res = await pay("https://license-intel.x402tookit.com/license-lookup?id=Apache-2.0");
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-lookup?id=Apache-2.0")
    print(res.status_code, res.text)