ontosphere: Browser-based RDF/ontology knowledge graph editor — load RDF from files, URLs or SPARQL endpoints

by ThHanke · MCP Server · ★ 248

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

Security audit verdict: SAFE · quality 63/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours.

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

fair-datagraph-editorjson-ldknowledge-graphlinked-datamcpmodel-context-protocolontologyowlrdf

Quick Facts

Stars248
Forks31
LanguageTypeScript
CategoryMCP Server
Quality Score63/100
Open Issues1
Last Updated2026-10-16
Created2025-09-03
Platformsbrowser, cli, mcp, node
Est. Tokens~22k

About ontosphere

Ontosphere — Browser-based RDF Knowledge Graph Editor ==================================================== Table of Contents Overview Key capabilities Quick start (development) Startup / URL parameters Reasoning Reasoning demo CORS and proxies Using the UI Developer utilities Troubleshooting AI / MCP Integration How it works Setup (Playwright / headless) Recommended workflow Using Ontosphere with...

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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