OPC UA MCP server

This is a small helper that connects your AI assistant to OPC UA, a common way industrial equipment talks to computers. Once it is set up, you can ask your AI in plain words what a machine is doing, or tell it to change a setting. It is mainly for people who work with factory or plant systems and want to use AI without writing code.

What this MCP server does

You ask your AI something like what is the value of node ns=2;i=2. Your AI sends that request to this helper program. The helper talks to your OPC UA server, which reads the value from the device or simulator behind it. The value comes back to your AI, and your AI shows it to you in the chat. If you ask it to set a value, the helper writes that value to the node instead.

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What you can do with it

• Read the current value of a single OPC UA node
• Write a value to a single OPC UA node to change a setting
• Browse the nodes available on the server
• Read several nodes at once
• Write to several nodes at once
• Ask for machine values in plain words instead of using an OPC UA tool

Try asking your AI

• “What's the value of node ns=2;i=2?”
• “Set node ns=2;i=3 to 100.”
• “List the nodes on the server.”
• “Read nodes ns=2;i=2 and ns=2;i=4 for me.”

What it gives back to you

You get short text answers in the chat, like the node ID and its value, or a message saying the write succeeded or failed. When you browse or read several nodes, you get a list of node IDs and their values. If something goes wrong, you get an error message instead.

Before you start

Who it's for

Engineers and developers who work with industrial automation and want to check or adjust machine values through an AI chat.