License Lockfile

{
  "checked": 2,
  "count": 2,
  "disclaimer": "Triage indicator only, not legal or compliance advice",
  "failed": 0,
  "failures": [],
  "overall": "yes",
  "packages": [
    {
      "compatible": "yes",
      "disclaimer": "Triage indicator only, not legal or compliance advice",
      "license": "MIT",
      "package": "express",
      "policy": "permissive-default",
      "reason": "Permissive license matches permissive-default policy",
      "source": "npm-registry",
      "spdx": "MIT",
      "version": "4.18.2"
    },
    {
      "compatible": "yes",
      "disclaimer": "Triage indicator only, not legal or compliance advice",
      "license": "MIT",
      "package": "lodash",
      "policy": "permissive-default",
      "reason": "Permissive license matches permissive-default policy",
      "source": "npm-registry",
      "spdx": "MIT",
      "version": "4.17.21"
    }
  ],
  "policy": "permissive-default",
  "source": "npm-registry",
  "summary": {
    "no": 0,
    "unknown": 0,
    "yes": 2
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://payload402.edgebytenet.workers.dev/license/lockfile?packages=lodash%404.17.21%2Cexpress%404.18.2'

# 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://payload402.edgebytenet.workers.dev/license/lockfile?packages=lodash%404.17.21%2Cexpress%404.18.2' \
  | 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%2Fpayload402.edgebytenet.workers.dev%2Flicense%2Flockfile
const res = await pay("https://payload402.edgebytenet.workers.dev/license/lockfile?packages=lodash%404.17.21%2Cexpress%404.18.2");
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://payload402.edgebytenet.workers.dev/license/lockfile?packages=lodash%404.17.21%2Cexpress%404.18.2")
    print(res.status_code, res.text)