{"repo":"ThHanke/ontosphere","free":true,"listed":false,"github":"https://github.com/ThHanke/ontosphere","clone":"git clone https://github.com/ThHanke/ontosphere.git","description":"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.","language":"TypeScript","stars":165,"topics":["fair-data","graph-editor","json-ld","knowledge-graph","linked-data","mcp","ontology","owl","rdf","reactodia"],"license":null,"category":"mcp-servers","readme_excerpt":"Ontosphere Browser-based RDF knowledge-graph editor with client-side OWL 2 DL reasoning, reasoner-verified repair, and a Model Context Protocol server for AI agents.     Author, reason over, and repair RDF/OWL knowledge graphs entirely in your browser. Ontosphere loads RDF from files, URLs, or SPARQL endpoints; lets you author nodes and edges on a live canvas; runs a complete OWL 2 DL reasoner (Konclude, compiled to WebAssembly) with inferred triples shown inline; proposes reasoner-verified repairs for inconsistencies; and exposes everything to AI agents through a Model Context Protocol server. No backend, no install — just a browser tab. I want to… Start here ------------ ------------ 🚀  Try the live demo Open Ontosphere ↗ 🎬  Watch feature tutorials Video tutorials 🤖  Connect an AI agent AI / MCP integration 💻  Run it locally Quick start 📂  Load my own data Startup / URL parameters 📄  Read the paper ISWC 2026 demo paper ↗ 🛠️  Contribute Contributing Table of Contents - Overview - Key capabilities - Video tutorials - Using the UI - Reasoning - SHACL validation - Startup / URL parameters - AI / MCP Integration - How it works - Agent edit provenance - Recommended workflow - Using Ontosphere with any AI - Claude Code / Playwright - AI Relay Bridge (ChatGPT, Gemini, Claude.ai) - Developer - Quick start (development) - Reasoning demo (OWL 2 DL patterns) - CORS and proxies - Developer utilities - Troubleshooting - Recording demo v","default_branch":null,"files":null,"tree":[],"storefront":"/r/ThHanke","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/ThHanke/ontosphere/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}