The CoinPay CLI from Composer. coinpay x402 pay buys a crawl pass from any site running x402-gateway.
composer global require profullstack/coinpay
coinpay x402 pay https://rssamplifier.com/crawl --output pass.json
The CLI itself is @profullstack/coinpay on npm. This package is a launcher: it runs a coinpay already installed with npm, or fetches the CLI through npx, bunx, pnpm dlx or deno run. Node.js 20+, Bun or Deno is required. COINPAY_VERSION pins the npm version; COINPAY_BIN points at a specific executable.