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 58 vector knowledge bases servers tracked. 5 score above 50 (established tier). The highest-rated is qdrant/mcp-server-qdrant at 63/100 with 1,270 stars. 1 of the top 10 are actively maintained.

Get all 58 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	qdrant/mcp-server-qdrant An official Qdrant Model Context Protocol (MCP) server implementation	63	Established	1,270	Python
2	mhalder/qdrant-mcp-server MCP server for semantic search using local Qdrant vector database and OpenAI...	58	Established	21	TypeScript
3	tomschell/personal-kg-mcp Personal Knowledge Graph MCP Server - Decision intelligence for multi-agent workflows	51	Established	6	TypeScript
4	pvliesdonk/markdown-vault-mcp Generic markdown collection MCP server with FTS5 + semantic search,...	51	Established	1	Python
5	n-r-w/knowledgegraph-mcp MCP server for enabling persistent knowledge storage for Claude through a...	51	Established	21	TypeScript
6	cornelcroi/context-lens Semantic search knowledge base for MCP-enabled AI assistants. Index local...	46	Emerging	19	Python
7	Knuckles-Team/vector-mcp Vector MCP Server for AI Agents - Supports ChromaDB, Couchbase, MongoDB,...	44	Emerging	9	Python
8	hadv/wisdomforge A powerful knowledge management system that forges wisdom from experiences,...	41	Emerging	5	TypeScript
9	henrychong-ai/mcp-neo4j-knowledge-graph Neo4j knowledge graph MCP server with temporal versioning, semantic search,...	39	Emerging	1	TypeScript
10	angrysky56/project-synapse-mcp Transforms raw text into interconnected knowledge graphs and autonomously...	38	Emerging	8	Python
11	fabio-rovai/open-ontologies AI-native ontology engine: a Rust MCP server with tools for building,...	37	Emerging	12	Rust
12	NocturnLabs/opencode-personal-knowledge 🧠 Personal knowledge MCP server with vector database for Opencode. Store and...	37	Emerging	8	TypeScript
13	bahdotsh/indxr A fast codebase indexer and MCP server for AI coding agents.	36	Emerging	39	Rust
14	maxzrff/KnowledgeMCP Model Context Protocol (MCP) server for local vector storage & semantic...	36	Emerging	6	Python
15	Aman-CERP/amanmcp AmanMCP is a local-first RAG MCP server for developers - providing hybrid...	36	Emerging	3	Go
16	BjornMelin/qdrant-neo4j-crawl4ai-mcp MCP server combining Qdrant vector search, Neo4j knowledge graphs, and...	34	Emerging	8	Python
17	drewburchfield/obsidian-graph-mcp Semantic knowledge graph navigation for Obsidian or markdown vaults using...	33	Emerging	8	Python
18	sonesuke/oboyu Self-hosted MCP Japanese text indexing & search—chunking+embeddings with...	31	Emerging	2	Python
19	bryankthompson/mcp-server-qdrant-enhanced Enhanced Qdrant MCP Server is a production-ready fork of the original that...	30	Emerging	1	Python
20	BjornMelin/unified-knowledge-system A comprehensive unified knowledge management system integrating multiple...	29	Experimental	7	—
21	jbenshetler/mcp-ragex MCP server for intelligent code search: semantic (RAG), symbolic...	28	Experimental	16	Python
22	NodeSpaceAI/nodespace-core Local-first knowledge base with semantic search for AI coding assistants....	28	Experimental	3	TypeScript
23	Hyperkorn/qdrant-neo4j-crawl4ai-mcp 🧠 Enhance AI coordination with the Qdrant Neo4j Crawl4AI MCP server,...	27	Experimental	2	Python
24	FF-TEC/NeuronCite Local, privacy-preserving semantic document search engine with citation verification	26	Experimental	7	Rust
25	ChrisGVE/workspace-qdrant-mcp Project-scoped Qdrant MCP server for workspace collections with scratchbook...	26	Experimental	1	Rust
26	skeletor-js/medulla A free, open-source, git-native knowledge engine for software projects.	25	Experimental	5	Rust
27	graph-memory/graphmemory MCP server that builds a semantic graph memory from your project — indexes...	25	Experimental	3	TypeScript
28	gaspardpetit/nfrx nfrx is an inference exchange gateway	25	Experimental	—	Go
29	omarkamali/semango 🥭 Semango is a hybrid search engine that combines lexical (BM25) and...	24	Experimental	1	C++
30	madeinoz67/madeinoz-knowledge-system Knowledge pack for PAI	24	Experimental	3	Python
31	Destrayon/Connapse Open-source, self-hosted knowledge backend for AI agents — hybrid search...	24	Experimental	4	C#
32	eztakesin/doc-indexer-mcp Local document indexer MCP server for semantic search over PDF, Excel, SQL,...	23	Experimental	2	Rust
33	ry-ops/qdrant-fabric Model Context Protocol server for Qdrant - Part of Infrastructure as a...	22	Experimental	1	Python
34	GrafeoDB/grafeo-mcp Exposes Grafeo as a set of MCP tools so that AI agents and assistants can...	22	Experimental	1	Python
35	tidyinfo/qmd A high-performance, private Markdown search engine with Hybrid Search (BM25...	22	Experimental	1	Rust
36	ndxr/ndxr Local-first context engine for AI coding agents	22	Experimental	—	Rust
37	mcp-tool-shop-org/repo-knowledge Repo knowledge system — relational catalog with full-text search, audit...	22	Experimental	—	TypeScript
38	Blysspeak/aurelius Self-hosted knowledge graph memory for developers and AI agents. MCP server,...	22	Experimental	—	Rust
39	ncasfl/Qdrant-MCP CP server exposing Qdrant vector DB store and GPU-accelerated embedding...	22	Experimental	—	Python
40	apifyforge/causal-panopticon-mcp Causal Panopticon is a cross-domain causal discovery and inference engine...	22	Experimental	—	—
41	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
42	Looted/kibi Repo-local, per-git-branch, queryable knowledge base for LLM Agents.	22	Experimental	—	TypeScript
43	apifyforge/knowledge-graph-causal-discovery-mcp Knowledge graph causal discovery over multi-domain research data, delivered...	22	Experimental	—	—
44	Chetic/chunksilo Local semantic search over your documents via MCP. pip install, point at...	21	Experimental	—	Python
45	getlore-ai/lore Research knowledge repository with semantic search and citations. Give every...	21	Experimental	—	TypeScript
46	UnitVectorY-Labs/mcp-markdown-rag A local-first command-line tool for indexing and semantically searching...	21	Experimental	—	Go
47	kogunlowo123/mcp-server-vector-db MCP server for vector database operations - Pinecone, Weaviate, Qdrant, and ChromaDB	21	Experimental	—	TypeScript
48	ambicuity/KINDX Local-first hybrid cli search engine (BM25 + Vector) for personal knowledge...	21	Experimental	—	TypeScript
49	baobab00/kgn Knowledge graph CLI + MCP server for AI agents — PostgreSQL/pgvector backed...	21	Experimental	—	Python
50	patw/avs-docs-mcp A vector search MCP for document retrieval using MongoDB Atlas Vector Search...	19	Experimental	2	Python
51	MsFixer101/idea-basin-mcp MCP server for Idea Basin — semantic knowledge graph search, browsing, and...	19	Experimental	—	JavaScript
52	hdjebar/neo4j-yass-mcp Production-ready, security-enhanced MCP server for Neo4j with LLM...	17	Experimental	—	Python
53	Modzer0/pyvector A lightweight vector database implementation with Model Context Protocol...	17	Experimental	—	Python
54	hiatamaworkshop/mycelium Bio-inspired semantic filtering engine. Ecosystem simulation for knowledge...	14	Experimental	—	JavaScript
55	Ryan-Clinton/knowledge-graph-causal-discovery-mcp Knowledge Graph & Causal Discovery MCP Server	13	Experimental	—	—
56	steiner385/qdrant-mcp-server MCP server for semantic code search using Qdrant vector database and OpenAI...	13	Experimental	—	Python
57	youngsecurity/discord_vector_db A tool for retrieving Discord messages and storing them in a vector database...	12	Experimental	4	Python
58	guangxiangdebizi/KnowledgeGraph-MCP 本项目提供一个专业的 MCP 服务器，让 AI 助手（如 Claude、Cursor、Cline 等）能够直接访问和查询德国家族企业知识图谱数据库。通过...	10	Experimental	1	Python

Comparisons in this category

mcp-server-qdrant and qdrant-mcp-server (63 vs 58) mcp-server-qdrant and mcp-server-qdrant-enhanced (63 vs 30) qdrant-mcp-server and vector-mcp (58 vs 44) qdrant-mcp-server and qdrant-neo4j-crawl4ai-mcp (58 vs 34) qdrant-mcp-server and KnowledgeMCP (58 vs 36) knowledgegraph-mcp and KnowledgeMCP (51 vs 36) qdrant-mcp-server and mcp-neo4j-knowledge-graph (58 vs 39) qdrant-mcp-server and mcp-server-qdrant-enhanced (58 vs 30) knowledgegraph-mcp and mcp-neo4j-knowledge-graph (51 vs 39) markdown-vault-mcp and obsidian-graph-mcp (51 vs 33)