Vector Knowledge Bases MCP Servers

Tools for building searchable knowledge bases using vector embeddings, semantic search, and hybrid retrieval methods. Includes document indexing, RAG systems, and knowledge graph integration. Does NOT include general web search, document processing without semantic search, or LLM orchestration frameworks.

There are 63 vector knowledge bases servers tracked. 2 score above 50 (established tier). The highest-rated is mhalder/qdrant-mcp-server at 59/100 with 21 stars and 790 monthly downloads. 1 of the top 10 are actively maintained.

Get all 63 projects as JSON

curl "https://pt-edge.onrender.com/api/v1/datasets/quality?domain=mcp&subcategory=vector-knowledge-bases&limit=20"

Open to everyone — 100 requests/day, no key needed. Get a free key for 1,000/day.

#	Server	Score	Tier	Stars	Language
1	mhalder/qdrant-mcp-server MCP server for semantic search using local Qdrant vector database and OpenAI...	59	Established	21	TypeScript
2	qdrant/mcp-server-qdrant An official Qdrant Model Context Protocol (MCP) server implementation	56	Established	1,270	Python
3	cornelcroi/context-lens Semantic search knowledge base for MCP-enabled AI assistants. Index local...	48	Emerging	19	Python
4	tomschell/personal-kg-mcp Personal Knowledge Graph MCP Server - Decision intelligence for multi-agent workflows	45	Emerging	6	TypeScript
5	n-r-w/knowledgegraph-mcp MCP server for enabling persistent knowledge storage for Claude through a...	45	Emerging	21	TypeScript
6	tobocop2/lilbee Local, offline experimental knowledge base. Index documents and code, search...	42	Emerging	4	Python
7	Knuckles-Team/vector-mcp Vector MCP Server for AI Agents - Supports ChromaDB, Couchbase, MongoDB,...	41	Emerging	9	Python
8	fabio-rovai/open-ontologies AI-native ontology engine: a Rust MCP server with tools for building,...	38	Emerging	12	Rust
9	bahdotsh/indxr A fast codebase indexer and MCP server for AI coding agents.	35	Emerging	39	Rust
10	pvliesdonk/markdown-vault-mcp Generic markdown collection MCP server with FTS5 + semantic search,...	35	Emerging	1	Python
11	Aman-CERP/amanmcp AmanMCP is a local-first RAG MCP server for developers - providing hybrid...	34	Emerging	3	Go
12	hadv/wisdomforge A powerful knowledge management system that forges wisdom from experiences,...	34	Emerging	5	TypeScript
13	NocturnLabs/opencode-personal-knowledge 🧠 Personal knowledge MCP server with vector database for Opencode. Store and...	33	Emerging	8	TypeScript
14	angrysky56/project-synapse-mcp Transforms raw text into interconnected knowledge graphs and autonomously...	32	Emerging	8	Python
15	maxzrff/KnowledgeMCP Model Context Protocol (MCP) server for local vector storage & semantic...	32	Emerging	6	Python
16	drewburchfield/obsidian-graph-mcp Semantic knowledge graph navigation for Obsidian or markdown vaults using...	31	Emerging	8	Python
17	bryankthompson/mcp-server-qdrant-enhanced Enhanced Qdrant MCP Server is a production-ready fork of the original that...	28	Experimental	1	Python
18	angrysky56/coder_db An intelligent code memory system that leverages vector embeddings,...	28	Experimental	8	Python
19	BjornMelin/qdrant-neo4j-crawl4ai-mcp MCP server combining Qdrant vector search, Neo4j knowledge graphs, and...	28	Experimental	8	Python
20	FF-TEC/NeuronCite Local, privacy-preserving semantic document search engine with citation verification	26	Experimental	7	Rust
21	gaspardpetit/nfrx nfrx is an inference exchange gateway	26	Experimental	—	Go
22	Destrayon/Connapse Open-source, self-hosted knowledge backend for AI agents — hybrid search...	25	Experimental	4	C#
23	sonesuke/oboyu Self-hosted MCP Japanese text indexing & search—chunking+embeddings with...	25	Experimental	2	Python
24	NodeSpaceAI/nodespace-core Local-first knowledge base with semantic search for AI coding assistants....	25	Experimental	3	TypeScript
25	graph-memory/graphmemory MCP server that builds a semantic graph memory from your project — indexes...	25	Experimental	3	TypeScript
26	Hyperkorn/qdrant-neo4j-crawl4ai-mcp 🧠 Enhance AI coordination with the Qdrant Neo4j Crawl4AI MCP server,...	24	Experimental	2	Python
27	mzazon/vault-search Hybrid search for Obsidian vaults — BM25 + fuzzy + semantic vector search...	24	Experimental	2	TypeScript
28	henrychong-ai/mcp-neo4j-knowledge-graph Neo4j knowledge graph MCP server with temporal versioning, semantic search,...	23	Experimental	1	TypeScript
29	ChrisGVE/workspace-qdrant-mcp Project-scoped Qdrant MCP server for workspace collections with scratchbook...	23	Experimental	1	Rust
30	mshadmanrahman/root-kg Personal knowledge graph with entity extraction, GraphRAG, and MCP...	23	Experimental	1	Python
31	skeletor-js/medulla A free, open-source, git-native knowledge engine for software projects.	23	Experimental	5	Rust
32	apifyforge/knowledge-graph-causal-discovery-mcp Knowledge graph causal discovery over multi-domain research data, delivered...	22	Experimental	—	—
33	MsFixer101/idea-basin-mcp MCP server for Idea Basin — semantic knowledge graph search, browsing, and...	22	Experimental	—	JavaScript
34	BjornMelin/unified-knowledge-system A comprehensive unified knowledge management system integrating multiple...	22	Experimental	7	—
35	jbenshetler/mcp-ragex MCP server for intelligent code search: semantic (RAG), symbolic...	22	Experimental	16	Python
36	baobab00/kgn Knowledge graph CLI + MCP server for AI agents — PostgreSQL/pgvector backed...	22	Experimental	—	Python
37	madeinoz67/madeinoz-knowledge-system Knowledge pack for PAI	22	Experimental	3	Python
38	ambicuity/KINDX Local-first hybrid cli search engine (BM25 + Vector) for personal knowledge...	22	Experimental	—	TypeScript
39	UnitVectorY-Labs/mcp-markdown-rag A local-first command-line tool for indexing and semantically searching...	22	Experimental	—	Go
40	kogunlowo123/mcp-server-vector-db MCP server for vector database operations - Pinecone, Weaviate, Qdrant, and ChromaDB	22	Experimental	—	TypeScript
41	Looted/kibi Repo-local, per-git-branch, queryable knowledge base for LLM Agents.	22	Experimental	—	TypeScript
42	UserTheo02726/cherry-mcp Cherry Studio 知识库的 MCP 服务，让 AI 客户端可以直接搜索本地知识库。	22	Experimental	—	Python
43	ndxr/ndxr Local-first context engine for AI coding agents	22	Experimental	—	Rust
44	mcp-tool-shop-org/repo-knowledge Repo knowledge system — relational catalog with full-text search, audit...	22	Experimental	—	TypeScript
45	Blysspeak/aurelius Self-hosted knowledge graph memory for developers and AI agents. MCP server,...	22	Experimental	—	Rust
46	ncasfl/Qdrant-MCP CP server exposing Qdrant vector DB store and GPU-accelerated embedding...	22	Experimental	—	Python
47	apifyforge/causal-panopticon-mcp Causal Panopticon is a cross-domain causal discovery and inference engine...	22	Experimental	—	—
48	eztakesin/doc-indexer-mcp Local document indexer MCP server for semantic search over PDF, Excel, SQL,...	21	Experimental	2	Rust
49	pkmdev-sec/cocoindex-claude-code Complete knowledge base system with semantic search for Claude Code CLI....	21	Experimental	2	Python
50	tidyinfo/qmd A high-performance, private Markdown search engine with Hybrid Search (BM25...	20	Experimental	1	Rust
51	omarkamali/semango 🥭 Semango is a hybrid search engine that combines lexical (BM25) and...	20	Experimental	1	C++
52	GrafeoDB/grafeo-mcp Exposes Grafeo as a set of MCP tools so that AI agents and assistants can...	20	Experimental	1	Python
53	ry-ops/qdrant-fabric Model Context Protocol server for Qdrant - Part of Infrastructure as a...	20	Experimental	1	Python
54	Chetic/chunksilo Local semantic search over your documents via MCP. pip install, point at...	19	Experimental	—	Python
55	getlore-ai/lore Research knowledge repository with semantic search and citations. Give every...	19	Experimental	—	TypeScript
56	Modzer0/pyvector A lightweight vector database implementation with Model Context Protocol...	19	Experimental	—	Python
57	Avi-141/weft Local-first knowledge graph for browser tabs. Louvain clustering, PageRank,...	15	Experimental	8	Python
58	hdjebar/neo4j-yass-mcp Production-ready, security-enhanced MCP server for Neo4j with LLM...	15	Experimental	—	Python
59	chernistry/ohmyrepos Oh My Repos: Semantic search for GitHub starred repositories.	15	Experimental	—	Python
60	hiatamaworkshop/mycelium Bio-inspired semantic filtering engine. Ecosystem simulation for knowledge...	14	Experimental	—	JavaScript
61	Ryan-Clinton/knowledge-graph-causal-discovery-mcp Knowledge Graph & Causal Discovery MCP Server	14	Experimental	—	—
62	patw/avs-docs-mcp A vector search MCP for document retrieval using MongoDB Atlas Vector Search...	13	Experimental	2	Python
63	steiner385/qdrant-mcp-server MCP server for semantic code search using Qdrant vector database and OpenAI...	11	Experimental	—	Python

Comparisons in this category

qdrant-mcp-server and mcp-server-qdrant (59 vs 56) mcp-server-qdrant and mcp-server-qdrant-enhanced (56 vs 28) qdrant-mcp-server and vector-mcp (59 vs 41) qdrant-mcp-server and qdrant-neo4j-crawl4ai-mcp (59 vs 28) qdrant-mcp-server and KnowledgeMCP (59 vs 32) qdrant-mcp-server and mcp-server-qdrant-enhanced (59 vs 28)