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ontosphere

by ThHanke · TypeScript · ★ 48

View on GitHub ↗

Browser-based RDF/ontology knowledge graph editor — load RDF from files, URLs or SPARQL endpoints; author nodes and edges on the canvas; run OWL-RL reasoning; apply multi-algorithm layout and clustering. AI-native via MCP tool surface and relay bridge. Fully client-side, no backend required.

#fair-data#graph-editor#json-ld#knowledge-graph#linked-data#mcp#model-context-protocol#ontology#owl#rdf#reactodia#reasoning#semantic-web#sparql#turtle#visualization

Install

npx -y github:ThHanke/ontosphere

Claude Desktop config

Add this to your claude_desktop_config.json: 

{
  "mcpServers": {
    "ontosphere": {
      "command": "npx",
      "args": [
        "-y",
        "github:ThHanke/ontosphere"
      ]
    }
  }
}

From the README

Ontosphere — Browser-based RDF Knowledge Graph Editor ==================================================== [](https://doi.org/10.5281/zenodo.19605270) [](LICENSE) | I want to… | Start here | |------------|------------| | Try the live demo | [Open Ontosphere ↗](https://thhanke.github.io/ontosphere) | | Connect an AI agent | [AI / MCP Integration](#ai--mcp-integration) | | Run it locally | [Quick start (development)](#quick-start-development) | | Load my own data | [Startup / URL parameters](#startup--url-parameters) | | Contribute code | [Contributing](#contributing--development-notes) | - […
Read full README on GitHub →

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