Install Owl in Claude Code
This server doesn't publish a package to a registry, so follow the install steps in its README. Once it runs, register it with Claude Code:
claude mcp add owl -- <command to start the server>Frequently asked questions
What does the Owl MCP server do?
Work with OWL/TTL/RDF ontologies: SPARQL queries, HermiT/Pellet reasoning and CRUD operations on knowledge graphs.
Is the Owl MCP server free?
Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.
Does Owl run locally or remotely?
Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.
How do I add Owl to Claude Code?
Follow the install steps in the project's README at https://github.com/liftkkkk/owl-mcp, then register it with "claude mcp add".
More knowledge, memory & rag MCP servers
View allRAG kb
fish827-08/rag-kb
Local-first agent memory and knowledge base: hybrid dense and BM25 retrieval, document and webpage ingestion and optional RAG answers via local Ollama.
Memkin
AndreLYL/memkin
Local-first personal memory that distills Feishu/Lark chats and Claude Code/Codex sessions into a private knowledge graph of people, projects and tasks.
Weighted Compact
zzallirog/weighted-compact
Inspectable memory for Claude Code: read-only search and session compaction over a local, signal-scored parse of its project logs, with no outbound calls.
Lore
davidgut1982/lore-mcp
Persistent knowledge layer for agents: knowledge base, investigation threads and a journal with multi-agent attribution, on SQLite, PostgreSQL or Supabase.
Ctxfile
ctxfile/ctxfile
Snapshots a project's working state (files, git, plan, decisions) into one context object so a session can move between agents. Local and read-only.
Hipocampo
carrasquelalex1/hipocampo
Bilingual (English/Spanish) dual-memory system on PostgreSQL, pgvector and NVIDIA NIM with progressive retrieval, deduplication, checkpoints and auto-repair.