ontosphere

About ontosphere

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...

fair-data graph-editor json-ld knowledge-graph linked-data mcp model-context-protocol ontology owl rdf

Quick Facts

Stars	248
Forks	31
Language	TypeScript
Category	MCP Server
Quality Score	32.8/100
Open Issues	1
Last Updated	2026-10-16
Created	2025-09-03
Platforms	browser, cli, mcp, node
Est. Tokens	~98148k

Compatible Skills

These tools work well together with ontosphere for enhanced workflows:

session-graph — semantic(0.39)+complementary+rare_topics+similar_pop (57%)
open-ontologies — semantic(0.50)+rare_topics+similar_pop+shared_platform (53%)
open-hikmah — semantic(0.17)+complementary+same_lang+similar_pop+shared_platform (51%)
openhikmah-web — semantic(0.17)+complementary+same_lang+similar_pop+shared_platform (51%)
comunica — semantic(0.24)+rare_topics+same_lang+similar_pop+shared_platform (47%)

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Frequently Asked Questions

What is ontosphere?

ontosphere is 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 clusteri. It is categorized as a MCP Server with 248 GitHub stars.

What programming language is ontosphere written in?

ontosphere is primarily written in TypeScript. It covers topics such as fair-data, graph-editor, json-ld.

How do I install or use ontosphere?

You can find installation instructions and usage details in the ontosphere GitHub repository at github.com/ThHanke/ontosphere. The project has 248 stars and 31 forks, indicating an active community.

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