global-agent simplifies using HTTP(S) proxies in Node.js without modifying existing code. It globally applies proxy settings from environment variables (HTTP_PROXY, HTTPS_PROXY, NO_PROXY), enabling seamless proxy integration for libraries like node-fetch or axios. This eliminates the need to configure individual packages, promoting consistent proxy handling across your application and dependencies. Install it as a dependency and require/import it, and your network requests will automatically route through your configured proxy.