# node-opcua

> The open-source OPC UA stack for Node.js and TypeScript. Client, Server, and PubSub SDK.
> Production-grade since 2014. Maintained by Sterfive SAS.
> OPC Foundation Corporate Member. MIT-licensed core.

## Latest release

- v2.174.0 release notes: https://node-opcua.github.io/release-notes/2026/06/30/v2-174-0-role-based-security.html
- v2.174.0 on GitHub: https://github.com/node-opcua/node-opcua/releases/tag/v2.174.0

## Documentation

- Home: https://node-opcua.github.io/
- Getting started: https://node-opcua.github.io/getting-started.html
- API reference (latest): https://node-opcua.github.io/api_doc/latest/
- Role-Based Security and User Management (OPC 10000-18): https://node-opcua.github.io/role_based_security.html
- Projects and ecosystem: https://node-opcua.github.io/projects.html
- About and history: https://node-opcua.github.io/about.html

## News and writing

- News index: https://node-opcua.github.io/news.html
- RSS feed: https://node-opcua.github.io/feed.xml

## Source and packages

- GitHub organisation: https://github.com/node-opcua
- Core package on npm: https://www.npmjs.com/package/node-opcua
- Download trends: https://npmtrends.com/node-opcua-client

## Commercial support

- Sterfive (maintainer, commercial modules, SLA, consulting): https://www.sterfive.com

## Curated external reading

- OPC UA Role-Based Security in Practice (Sterfive blog): https://www.sterfive.com/en/blog/opcua-role-based-security-nodeopcua-2-174-0/
- OPC UA Part 18 reference TL;DR (Sterfive Learn): https://www.sterfive.com/en/learn/opcua-reference/role-based-security

## For more detail

- Comprehensive content manifest: https://node-opcua.github.io/llms-full.txt