What is the key difference between Modbus MCP and Opcua MCP?

Modbus MCP belongs to the Industrial & IoT category with local stdio execution, while Opcua MCP belongs to the Industrial & IoT category with local stdio execution.

How do I install Modbus MCP or Opcua MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Modbus MCP and Opcua MCP free or paid?

Modbus MCP operates under a Free / Open Source model (No auth required). Opcua MCP operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Modbus MCP lists 5 tools with 3 views and 25 GitHub stars. Opcua MCP lists 2 tools with 4 views and 29 GitHub stars.

Can I use both Modbus MCP and Opcua MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Modbus MCP vs Opcua MCP

In-depth architectural comparison of the Modbus MCP and Opcua MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Modbus MCP

Industrial & IoT · Local stdio

Quality: 32/100 (Emerging) | Auth: No auth required

Opcua MCP

Industrial & IoT · Local stdio

Quality: 37/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Modbus MCP if you need specialized Industrial & IoT tools running via a local process. Choose Opcua MCP if your workspace requires Industrial & IoT integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Modbus MCP when:

You need dedicated capabilities in the Industrial & IoT domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: MODBUS_TYPE, MODBUS_HOST, MODBUS_PORT, MODBUS_DEFAULT_SLAVE_ID, MODBUS_SERIAL_PORT, MODBUS_BAUDRATE, MODBUS_PARITY, MODBUS_STOPBITS.
Primary tools included: Reads and writes holding registers, Reads and writes coils, Reads input registers.

Explore Modbus MCP Details

Choose Opcua MCP when:

You need dedicated capabilities in the Industrial & IoT domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: OPCUA_SERVER_URL.

Feature & Specification Comparison

Specification	Modbus MCP kukapay Industrial & IoT	Opcua MCP kukapay Industrial & IoT
Summary
Category & Scope	Industrial & IoT	Industrial & IoT
Quality signal

Tools & Capabilities Breakdown

Modbus MCP Tools (5)

Reads and writes holding registers

Reads and writes coils

Reads input registers

Supports TCP, UDP, and serial Modbus connections

Analyzes register values with a customizable prompt

Opcua MCP Tools (2)

Description

Read the value of a specific OPC UA node.

Returns

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Modbus MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "kukapay-modbus-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "kukapay-modbus-mcp"
      ],
      "env": {
        "MODBUS_TYPE": "YOUR_MODBUS_TYPE_HERE",
        "MODBUS_HOST": "YOUR_MODBUS_HOST_HERE",
        "MODBUS_PORT": "YOUR_MODBUS_PORT_HERE",
        "MODBUS_DEFAULT_SLAVE_ID": "YOUR_MODBUS_DEFAULT_SLAVE_ID_HERE",
        "MODBUS_SERIAL_PORT": "YOUR_MODBUS_SERIAL_PORT_HERE",
        "MODBUS_BAUDRATE": "YOUR_MODBUS_BAUDRATE_HERE",
        "MODBUS_PARITY": "YOUR_MODBUS_PARITY_HERE",
        "MODBUS_STOPBITS": "YOUR_MODBUS_STOPBITS_HERE"
      }
    }
  }
}

Opcua MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "kukapay-opcua-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "kukapay-opcua-mcp"
      ],
      "env": {
        "OPCUA_SERVER_URL": "YOUR_OPCUA_SERVER_URL_HERE"
      }
    }
  }
}

Frequently Asked Questions

Modbus MCP is categorized under Industrial & IoT and uses a local stdio subprocess. In contrast, Opcua MCP belongs to Industrial & IoT using local stdio subprocess. Select Modbus MCP when you need capabilities focused on industrial & iot and Opcua MCP when you require tools for industrial & iot.

More alternatives to Modbus MCP More alternatives to Opcua MCP Industrial & IoT category hub