# OWL (Web Ontology Language)

> Use this tool when you need to manage and manipulate Web Ontology Language (OWL) ontologies, adding, removing, or finding axioms in OWL files. It solves problems in semantic web applications, knowledge graph management, and ontology development by providing a standardized interface for AI assistants to interact with ontologies. The tool accepts string-based axiom representations in OWL functional syntax as input and outputs manipulated ontologies, making it ideal for use cases requiring efficient ontology management without complex object model knowledge.

Canonical page: https://skillsregistry.net/skills/scimcp-owl  
JSON: https://api.skillsregistry.net/v1/skills/scimcp-owl

## Description

OWL-MCP is a Model Context Protocol server for managing Web Ontology Language (OWL) ontologies, providing tools for adding, removing, and finding axioms in OWL files. Built with py-horned-owl for ontology manipulation, it features thread-safe operations, automatic file synchronization, and a configuration system for managing named ontologies with consistent settings. The server exposes standardized MCP tools that enable AI assistants to directly manipulate ontologies through string-based axiom representations in OWL functional syntax, making it particularly valuable for semantic web applications, knowledge graph management, and ontology development without requiring deep understanding of complex object models.

## Trust

- **Trust score (0–1):** 0.58
- **Verification tier:** scanned
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** file-system
- **Updated:** 2026-09-28

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/scimcp-owl)
- **Repository:** <https://github.com/ai4curation/owl-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "scimcp-owl"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/scimcp-owl` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/scimcp-owl/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt