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OPC UA Modeler

io.github.node-opcua/node-opcua-modeler-mcp-server · v1.6.1

OPC UA companion spec types, namespace dependencies, and engineering units for AI agents

MCPremotelocal · npmno credentialsFiles & storageKnowledge & docs

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Last check

Reachable, 12 tools, protocol 2025-06-18 · checked 2026-10-17

Test & rating

A 100/100

What it does: 12 tools · 12 read, 0 write · Files & storage, Knowledge & docs

Test call list_namespaces: worked (994 ms)

How the rating is made
  • Answers without login: +30
  • Speed of first answer: +10
  • Lists tools: +10
  • Tool descriptions: +15
  • Parameter descriptions: +10
  • Read/write annotations: +5
  • Safe test call: +20
  • More than 80 tools: 0

Tested 2026-10-17. Fixed rules, no AI model. Grade A needs a successful real call.

Install

Remote URL
https://api.opcua-modeler.sterfive.io/api/mcp
Package
registry:   npm
identifier: node-opcua-modeler-mcp-server
version:    1.6.1
transport:  stdio

Tools

12 tools listed at last check
  • resolve_dependencies Given one or more companion spec namespace aliases, returns the full resolved dependency list that MUST go in the YAML `namespaces:` section. Always call this before generating the namespaces block.
  • list_namespaces List all well-known OPC UA companion spec namespace aliases with their full names, URIs, and dependencies. Use this to discover what namespaces are available.
  • list_types List ALL ObjectTypes, VariableTypes, and InterfaceTypes defined in a specific companion spec namespace. ALWAYS call this before using any type from a namespace — NEVER guess type names.
  • get_type_details Get detailed information about a specific type: its components, properties, methods, interfaces, and optional members. Use this to understand a type's structure before creating instances or subtypes. `specRef`, on the type and on a member, is the link to the section of the specification that defines
  • search_types Search for types across ALL companion specs by keyword. Use this when you don't know which namespace defines a type. Returns matching types with their namespace alias.
  • find_reusable_block Find reusable Interfaces / AddIns by capability — pass a member name or keyword (e.g. "SerialNumber", "DeviceHealth", "Location") and get the standard blocks that already expose it. PREFER applying/composing an existing block over redefining its members inline. Interfaces are applied with `interface
  • find_engineering_unit Find the official UNECE Rec. 20 engineering unit symbol for a given description. ALWAYS call this before using any engineering unit — NEVER guess unit symbols.
  • get_dsl_reference Get the grammar reference for the OPC UA modeler YAML DSL: file header, top-level sections, name-prefix conventions, minimal examples, and common mistakes. Call this FIRST before writing any YAML model by hand. Works without an API key.
  • opcua_model_validate Validate an OPC UA YAML model for correctness. Returns diagnostics with severity (error/warning/info), codes, messages, and line numbers. Works without an API key (limited to 50 calls/day). ALWAYS validate before generating.
  • opcua_model_generate Generate OPC UA NodeSet2.xml and Symbols.CSV from a YAML model. Requires an API key (set OPCUA_MODELER_API_KEY env var). Returns base64-encoded artifacts if the model is valid, or diagnostics if validation fails. Optionally set include_docs=true to also generate markdown documentation.
  • opcua_model_reverse Reverse-engineer a NodeSet2.xml file back into the YAML DSL format. Requires an API key (set OPCUA_MODELER_API_KEY env var). Optionally specify the target namespace URI to extract.
  • opcua_model_create Generate an OPC UA YAML model from a natural language description using AI. Requires an API key (set OPCUA_MODELER_API_KEY env var). The AI will auto-detect relevant companion specs, generate a validated model with documentation, and auto-correct validation errors.

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