listhen is a tiny, zero-dependency Node.js library for effortlessly starting HTTP(S) servers. It streamlines the process of listening on available ports, handling TLS certificates (including automatic generation), and integrating with popular frameworks like h3 and connect. listhen simplifies server setup, making it ideal for development, testing, and minimal production deployments where ease of use is paramount. Its lightweight nature ensures quick startup times and minimal overhead, perfect for serverless functions and similar environments.