OPCFoundation.NetStandard.Opc.Ua.Mcp

OPC UA MCP Server

A Model Context Protocol (MCP) server that exposes OPC UA Part 4 service calls as MCP tools, enabling AI assistants (Claude, GitHub Copilot, VS Code, etc.) to interact with OPC UA servers.

Install

dotnet tool install --global OPCFoundation.NetStandard.Opc.Ua.Mcp

Usage

# stdio transport (default) — for Claude Desktop, VS Code, Copilot
opcua-mcp

# Streamable HTTP transport (exposed only at /mcp) — for remote clients
opcua-mcp --transport http --port 5100

# --transport sse is a deprecated alias for --transport http

Tools

The server exposes tools through a tool profile — a bounded, named catalog selected with --profile core|services|administration|pubsub|diagnostics|full. full is the default and currently registers every tool listed below; core and the other profiles expose a smaller, focused subset. See the full documentation for the profile-to-tool mapping.

Tools in the full profile cover all OPC UA Part 4 service sets:

• Connection: Connect, Disconnect, GetConnectionStatus
• Attribute: Read, Write, HistoryRead, HistoryUpdate
• View: Browse, BrowseNext, TranslateBrowsePaths, RegisterNodes, UnregisterNodes, QueryFirst, QueryNext
• Node Management: AddNodes, AddReferences, DeleteNodes, DeleteReferences
• Method: Call
• Subscription: CreateSubscription, ModifySubscription, SetPublishingMode, Publish, Republish, DeleteSubscriptions, TransferSubscriptions
• MonitoredItem: CreateMonitoredItems, ModifyMonitoredItems, SetMonitoringMode, SetTriggering, DeleteMonitoredItems
• Discovery: FindServers, FindServersOnNetwork, GetEndpoints, RegisterServer, RegisterServer2
• Convenience: ReadValue, ReadValues, WriteValue, BrowseAll, CallMethod, ReadNode, Cancel

Embedding

The tools also ship as libraries, so an application can offer OPC UA tools to an LLM alongside its own without forking this server:

builder.Services.AddOpcUaMcpCore();

builder.Services.AddMcpServer()
    .WithStdioServerTransport()
    .WithOpcUaMcpFilters()
    .WithOpcUaCoreTools(McpToolProfile.Services)
    .WithTools<MyApplicationTools>();

Documentation

See the full documentation.