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</style><script type="module" src="/assets/hoisted.3WjCi9KP.js"></script></head> <body> <header class="navbar" data-astro-cid-ymhdp2rl> <div class="container navbar-container" data-astro-cid-ymhdp2rl> <a href="/" class="logo" data-astro-cid-ymhdp2rl> <span class="logo-dot" data-astro-cid-ymhdp2rl></span><span class="logo-text" data-astro-cid-ymhdp2rl>node-opcua</span> </a> <button class="menu-trigger" aria-label="Open menu" aria-expanded="false" type="button" data-astro-cid-ymhdp2rl> <span class="hamburger-bar" data-astro-cid-ymhdp2rl></span> <span class="hamburger-bar" data-astro-cid-ymhdp2rl></span> <span class="hamburger-bar" data-astro-cid-ymhdp2rl></span> </button> <div class="backdrop" aria-hidden="true" data-astro-cid-ymhdp2rl></div> <nav class="nav-drawer" aria-label="Main navigation" data-astro-cid-ymhdp2rl> <a href="/getting-started.html" class="nav-link" data-astro-cid-ymhdp2rl>Getting started</a> <a href="/api_doc/latest/" class="nav-link" data-astro-cid-ymhdp2rl>API reference</a> <a href="/projects.html" class="nav-link" data-astro-cid-ymhdp2rl>Projects</a> <a href="/news.html" class="nav-link" data-astro-cid-ymhdp2rl>News</a> <a href="https://www.npmjs.com/package/node-opcua/v/2.175.2" target="_blank" rel="noopener noreferrer" class="version-badge" aria-label="Latest release: v2.175.2" data-astro-cid-ymhdp2rl> <span class="version-number" data-astro-cid-ymhdp2rl>v2.175.2</span> <span class="version-label" data-astro-cid-ymhdp2rl>latest</span> </a> <a href="https://github.com/node-opcua/node-opcua" target="_blank" rel="noopener noreferrer" class="nav-link" data-astro-cid-ymhdp2rl>GitHub</a> <a href="https://github.com/sponsors/node-opcua" target="_blank" rel="noopener noreferrer" class="nav-link" data-astro-cid-ymhdp2rl>Sponsor</a> </nav> </div> </header>   <main>  <div class="projects-container" data-astro-cid-aid3sr62> <section class="projects-intro" data-astro-cid-aid3sr62> <h1 data-astro-cid-aid3sr62>The node-opcua ecosystem</h1> <p class="lede" data-astro-cid-aid3sr62>
Beyond the main SDK, node-opcua is part of a family of
        open-source and commercial modules and tools,
        maintained by Sterfive.
</p> </section> <section class="featured-projects" data-astro-cid-aid3sr62> <p class="section-eyebrow" data-astro-cid-aid3sr62>Featured</p> <h2 class="section-heading" data-astro-cid-aid3sr62>New from the project.</h2> <article class="featured-repo" data-astro-cid-aid3sr62> <h3 class="featured-name" data-astro-cid-aid3sr62> <a href="https://github.com/node-opcua/node-opcua-modeler-mcp-server" target="_blank" rel="noopener noreferrer" data-astro-cid-aid3sr62>node-opcua-modeler-mcp-server</a> </h3> <p class="featured-extended" data-astro-cid-aid3sr62>Lets AI agents (Claude, Cursor, and other MCP-compatible tooling) query, validate, and build OPC UA information models. Discover companion specification types, resolve namespace dependencies, look up engineering units. The first Model Context Protocol server for industrial automation.</p> </article> </section> <section class="projects-group" data-astro-cid-aid3sr62> <h2 data-astro-cid-aid3sr62>Core libraries</h2> <ul class="repo-list" data-astro-cid-aid3sr62> <li class="repo-item" data-astro-cid-aid3sr62> <span class="highlight-badge" data-astro-cid-aid3sr62>Featured</span> <a href="https://github.com/node-opcua/node-i3x" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-i3x </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>An implementation of the CESMII Industrial Information Interoperability eXchange (i3X) API for Node.js, bridging OPC UA address spaces to i3X context models.</span> </li><li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/node-opcua" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-opcua </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>The main client and server SDK.</span> </li><li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/node-opcua-pki" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-opcua-pki </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>PKI and certificate management for OPC UA.</span> </li><li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/node-opcua-crypto" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-opcua-crypto </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>Certificate tools, encryption, and signature support.</span> </li> </ul> </section><section class="projects-group" data-astro-cid-aid3sr62> <h2 data-astro-cid-aid3sr62>Companion specifications</h2> <ul class="repo-list" data-astro-cid-aid3sr62> <li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/node-opcua-isa95" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-opcua-isa95 </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>ISA-95 extension for node-opcua server.</span> </li> </ul> </section><section class="projects-group" data-astro-cid-aid3sr62> <h2 data-astro-cid-aid3sr62>Tooling</h2> <ul class="repo-list" data-astro-cid-aid3sr62> <li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/opcua-commander" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> opcua-commander </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>OPC UA client with a blessed (ncurses) terminal UI.</span> </li><li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/bench-opcua" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> bench-opcua </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>Performance benchmarks for OPC UA servers.</span> </li><li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/node-opcua-sampleserver" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-opcua-sampleserver </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>A simple reference OPC UA server based on node-opcua.</span> </li><li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/node-opcua-htmlpanel" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-opcua-htmlpanel </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>Small HTML panel for displaying monitored variables.</span> </li> </ul> </section><section class="projects-group" data-astro-cid-aid3sr62> <h2 data-astro-cid-aid3sr62>Related projects</h2> <ul class="repo-list" data-astro-cid-aid3sr62> <li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/node-wot-opcua-tools" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-wot-opcua-tools </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>Tools for bridging (node-)WoT and (node-)OPCUA.</span> </li><li class="repo-item" data-astro-cid-aid3sr62>  <a href="https://github.com/node-opcua/node-opcua-sample" target="_blank" rel="noopener noreferrer" class="repo-link" data-astro-cid-aid3sr62> node-opcua-sample </a> <span class="repo-separator" data-astro-cid-aid3sr62>&middot;</span> <span class="repo-description" data-astro-cid-aid3sr62>A simple OPC UA sample client demonstrating SDK usage.</span> </li> </ul> </section> <section class="projects-footer" data-astro-cid-aid3sr62> <p data-astro-cid-aid3sr62>
See the complete list of repositories on
<a href="https://github.com/node-opcua" target="_blank" rel="noopener noreferrer" data-astro-cid-aid3sr62>GitHub</a>.
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