OPC UA guides

Guides show how to get a specific job done. For step-by-step projects from the start, see the tutorials.

Guide	Contents
Simulator GUI	The eight workspaces and how to use them
Headless simulator	Interactive JSON-lines mode, scenario mode, the configuration object and the action list
MCP server	Connecting AI tools to the simulator, and the tool list
Configure security and users	A secure-only server, certificates and trust lists, user accounts and the SDK’s security options

The three programs (GUI, headless and MCP) share one simulator engine. A GUI button, a headless JSON command and an MCP tool call run the same action and return the same result.

Look up the functions and types of the C, C++ and .NET APIs in the API reference.