ontosphere

ThHanke/ontosphere

★ 126 stars TypeScript 🌐 Browser/Web Updated today

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.

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Quick Install

Copy the config for your editor. Some servers may need additional setup — check the README.

Add to claude_desktop_config.json:

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

README Excerpt

Ontosphere — Browser-based RDF Knowledge Graph Editor ==================================================== | 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) |

Tools (17)

apiKeyapiKeyHeaderbfobfo2020dcatdctermsfoafloadImportsontologiesontologyowlprovqudtrdfrdfUrlrdfsskos

Topics

fair-datagraph-editorjson-ldknowledge-graphlinked-datamcpmodel-context-protocolontologyowlrdfreactodiareasoningsemantic-websparqlturtle

ontosphere

Quick Install

README Excerpt

Tools (17)

Topics

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