--- id: version-3.2.0-what-is-verdaccio title: What is Verdaccio? original_id: what-is-verdaccio --- Verdaccio is a **lightweight private npm proxy registry** built in **Node.js** ## What's a registry * A repository for packages that implements the **CommonJS Compliant Package Registry specification** for reading package info * Provide an API compatible with npm clients **(yarn/npm/pnpm)** * Follow the semantic Versioning compatible **(semver)** ``` $> verdaccio ```  ## Using Verdaccio Using verdaccio with any node package manager client is quite straightforward.  You can use a custom registry either setting globally for all your projects ``` npm set registry http://localhost:4873 ``` or by command line as argument `--registry` in npm (slightly different in yarn) ``` npm install lodash --registry http://localhost:4873 ``` ## Private All packages that you publish are private and only accessible based in your configuration. ## Proxy Verdaccio cache all dependencies by demand and speed up installations in local or private networks. ## Verdaccio in a nutshell * It's a web app based on Node.js * It's a private npm registry * It's a local network proxy * It's a Pluggable application * It's a fairly easy install and use * We offer Docker and Kubernetes support * It is 100% compatible with yarn, npm and pnpm * It was **forked** based on `sinopia@1.4.0` and 100% **backward compatible**. * Verdaccio means **A green color popular in late medieval Italy for fresco painting**.