owl-mcp

Overview

OWL-MCP is a Model-Context-Protocol server that bridges AI systems with Web Ontology Language (OWL) ontologies. It provides a thread-safe interface for performing CRUD operations on OWL files, supporting formats compatible with py-horned-owl. The server maintains an in-memory model synchronized with disk files, enabling real-time updates. It's particularly well-suited for OBO-style ontologies, providing human-readable labels for entities with standard annotation properties.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

• add_axiom

  Add an OWL axiom to an ontology file

  Try:Add the axiom 'SubClassOf(:Person :Human)' to ontology.owlTry:Add a new subclass relationship between owl:Thing and Animal
• remove_axiom

  Remove an OWL axiom from an ontology file

  Try:Remove the axiom 'SubClassOf(:Person :Human)' from ontology.owlTry:Delete the subclass relationship between Animal and Mammal
• find_axioms

  Find OWL axioms in an ontology file matching certain criteria

  Try:Find all subclass axioms in ontology.owlTry:Search for axioms involving the :Person class
• create_ontology

  Create a new OWL ontology file

  Try:Create a new ontology file called animal_ontology.owlTry:Initialize an ontology with basic import declarations
• list_ontologies

  List available ontologies in the workspace

  Try:Show all available ontology filesTry:List all OWL files in the current directory
• get_entity_labels

  Get human-readable labels for ontology entities

  Try:Get all labels for entities in ontology.owlTry:Show the label for the class :Person
• sync_with_disk

  Force synchronization between in-memory model and disk file

  Try:Sync ontology.owl with diskTry:Update the in-memory model with changes from the file
• add_observer

  Register an observer for ontology change notifications

  Try:Add a callback for ontology changesTry:Register a notification handler for axiom additions
• remove_observer

  Remove an observer from ontology change notifications

  Try:Remove a notification callbackTry:Unregister an observer for ontology changes
• export_ontology

  Export an ontology to a different format

  Try:Export ontology.owl to OBO formatTry:Convert ontology to functional syntax
• validate_ontology

  Validate an ontology for consistency

  Try:Check if ontology.owl is consistentTry:Validate the ontology for structural correctness
• get_configuration

  Retrieve stored configuration for ontologies

  Try:Get stored configuration for ontology.owlTry:Show settings for the current ontology

Note: Tool names and functionality were extracted from the description section that mentions 'The MCP server provides function calls for finding, adding, or removing OWL axioms' and from the features listed in the README. These tools represent th

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Installation

{
  "mcpServers": {
    "owl-mcp": {
      "command": "uvx",
      "args": ["owl-mcp"]
    }
  }
}

FAQ

What OWL formats does OWL-MCP support?

OWL-MCP accepts any format supported by py-horned-owl. It follows OBO guidelines and recommends functional syntax for source files.

How does OWL-MCP synchronize with other tools like Protege?

The server keeps an in-memory model synchronized with disk files. When changes are made, they're written to disk. If you have Protege running with the same file open, Protege will automatically detect and display these updates.

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