Tools · Knowledge Base QA
Best MCP servers for knowledge base QA
502 MCP servers in the Official MCP Registry do knowledge base QA. 237 can be used as a hosted endpoint, with nothing to install, and 382 publish their source code.
| # | Tool | Relevance | Connect | Code | Seen |
|---|---|---|---|---|---|
| 51 | mcp-notion Notion for AI agents — search, read pages/blocks, query databases, create pages. | In name notion | HOSTEDLOCAL | Open | 2d ago |
| 52 | mcp-knowledge-rag Permission-aware RAG for agents — ingest docs, hybrid search, cited answers (hosted API). | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 53 | notion-arena MCP server for Notion Arena — 143 Notion components: 132 widgets + 11 recipes | In name notion | HOSTEDLOCAL | Open | 2d ago |
| 54 | rag MCP RAG server with hybrid search, multi-KB support, and AI-powered chunk contextualization. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 55 | sw-dev-knowledge-base-mcp Read-only offline MCP server over a curated Shopware developer knowledge base | In name knowledge base | HOSTEDLOCAL | Open | 2d ago |
| 56 | obsidian-sync-mcp Give AI agents access to your Obsidian vault via local files or Self-hosted LiveSync. | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 57 | obsidian-mcp-secure Secure MCP server for Obsidian with OWASP Top 10 controls and full audit logging. | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 58 | Obsidian CLI MCP Local MCP server for Obsidian Desktop via the official Obsidian CLI. | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 59 | mcp-local-rag Semantic code & doc search with keyword boost. AST code nav, auto HF mirror, local, privacy-first. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 60 | obsidian-mcp-server Read, write, search, and surgically edit Obsidian notes, tags, and frontmatter via MCP. | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 61 | rag-rat Repository intelligence, code graph, history, papertrail, and cross-agent memory for coding agents. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 62 | Calypso Multimodal RAG MCP Calypso multimodal RAG for grounded answers from docs, images, charts, and knowledge. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 63 | kObsidian Filesystem-first MCP for Obsidian — an LLM-maintained wiki inspired by Karpathy's LLM Wiki. | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 64 | notion-mcp-server Token-auth Notion MCP: pages, databases, blocks, comments, files. Runs headless in CI and agents. | In name notion | HOSTEDLOCAL | Open | 2d ago |
| 65 | better-notion Operate Notion with a single Markdown document — read, create, and update pages in one call. | In name notion | HOSTEDLOCAL | Open | 2d ago |
| 66 | FastMCP seed raise pipeline tracker — syncs from Obsidian CRM, generates meeting FastMCP seed raise pipeline tracker — syncs from Obsidian CRM, generates meeting prep, tracks… | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 67 | FastMCP server for Obsidian wikilink suggestions from a pre-computed knowledge g FastMCP server for Obsidian wikilink suggestions from a pre-computed knowledge graph (graphify… | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 68 | FastMCP server for bidirectional sync between personal and team Obsidian vaults FastMCP server for bidirectional sync between personal and team Obsidian vaults. | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 69 | Confluence Cloud MCP server for Confluence Cloud — page editing, navigation, and content management | In name confluence | HOSTEDLOCAL | Open | 2d ago |
| 70 | rag-vault Local RAG MCP server with hybrid search, PDF/DOCX support, and zero-config setup | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 71 | Obsidian Vault MCP Server Access Obsidian vaults via Local REST API - read, search, and interact with notes | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 72 | ragdrift-mcp Diagnose RAG drift: interpret scores, recommend thresholds, explain dimensions. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 73 | ragmetric-mcp RAG retrieval IR metrics: recall@k, hit@k, MRR, NDCG@k, evaluate_batch. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 74 | RAGScore Generate QA datasets & evaluate RAG systems with failure diagnosis. Any LLM. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 75 | velocirag Lightning-fast RAG for AI agents. 4-layer fusion, ONNX Runtime, sub-200ms search. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 76 | OmniClip RAG Read-only local-first MCP server for private Markdown, PDF, and Tika-backed search on Windows. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 77 | Local Vector Search MCP Local Markdown search, navigation and editing via MCP, with optional vector embeddings. | In name vector search | HOSTEDLOCAL | Open | 2d ago |
| 78 | Obsidian Semantic Search Read-only semantic search MCP server for Obsidian vaults using local Ollama embeddings. | In name obsidian | HOSTEDLOCAL | Open | 2d ago |
| 79 | Darwin RAG Local-first RAG engine with MCP server for AI agent integration. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 80 | quillrag Single-binary local RAG MCP server in Rust. MiniLM compiled in, hybrid search, zero deps. | In name rag | HOSTEDLOCAL | Open | 2d ago |
| 81 | ABS · AI Business System Lean operations knowledge base built on DBS: cited answers, tool cards, plans and diagnoses. | In description knowledge base | HOSTEDLOCAL | Open | 2h ago |
| 82 | Senzing Entity resolution — data mapping, SDK code generation, docs search, and error troubleshooting | In description docs search | HOSTEDLOCAL | Open | 4h ago |
| 83 | Pexafy Semantic search over free-to-use stock photos from 9 libraries: by words, image, or similar. | In description semantic search | HOSTEDLOCAL | Open | 13h ago |
| 84 | Agent Docs Search the official docs of Claude Code, Cursor, OpenAI Codex and MCP, refreshed daily. | In description docs search | HOSTEDLOCAL | Open | 1d ago |
| 85 | Tillpad Bounded KVP, RAG search, and wipe receipts for agent jobs over remote MCP | In description rag | HOSTEDLOCAL | Open | 1d ago |
| 86 | pmndrs docs Search and read the docs and examples of react-three-fiber, drei, zustand, jotai... from your agent | In description docs search | HOSTEDLOCAL | Open | 1d ago |
| 87 | Elfsight AI Chatbot Read conversations, leads, knowledge base and analytics of your Elfsight AI Chatbot widgets. | In description knowledge base | HOSTEDLOCAL | Open | 1d ago |
| 88 | cwi-discovery-engine CWI Discovery Engine: read-only music-catalog MCP — semantic search, sync lookup, knowledge graph. | In description semantic search | HOSTEDLOCAL | Open | 1d ago |
| 89 | DataSinking Full-text Asian financial reports (China, Korea, Japan, Taiwan) as clean Markdown for RAG agents. | In description rag | HOSTEDLOCAL | Open | 1d ago |
| 90 | Corebee AI Customer Support Run AI customer support from your terminal: conversations, knowledge base, and chat widget. | In description knowledge base | HOSTEDLOCAL | Open | 2d ago |
| 91 | tibiawiki-mcp TibiaWiki knowledge base: attribute queries over creatures, items, NPCs, quests and spells | In description knowledge base | HOSTEDLOCAL | Open | 2d ago |
| 92 | Simplepush Send tasks and notifications to people's phones. Answers build a queryable knowledge base. | In description knowledge base | HOSTEDLOCAL | Open | 2d ago |
| 93 | Ferritin — Rust documentation Search and read Rust documentation for the standard library and any crate on crates.io | In description documentation search | HOSTEDLOCAL | Open | 2d ago |
| 94 | llmref Versioned documentation registry and semantic search for AI tools and coding assistants. | In description semantic search | HOSTEDLOCAL | Open | 2d ago |
| 95 | brainkb MCP server for querying BrainKB, a knowledge base for neuroscience knowledge graphs. | In description knowledge base | HOSTEDLOCAL | Open | 2d ago |
| 96 | Alpha (Mossland) Korean crypto × AI media MCP — channel stance, daily briefs, RAG, canonical store, AI personas. | In description rag | HOSTEDLOCAL | Open | 2d ago |
| 97 | mistral Manage your Mistral platform — models, files, batch jobs, agents and RAG document libraries. | In description rag | HOSTEDLOCAL | Open | 2d ago |
| 98 | memoryoracle MemoryOracle - 10 agent memory tools: vector store, recall, summarization, redaction. | In description vector store | HOSTEDLOCAL | Open | 2d ago |
| 99 | Scrapiq Any URL to clean text, markdown, or JSON for LLM/RAG pipelines. | In description rag | HOSTEDLOCAL | Open | 2d ago |
| 100 | AgentBase Shared knowledge base for AI agents. Semantic search across agents, no setup required — just a URL. | In description knowledge base | HOSTEDLOCAL | Open | 2d ago |
FAQ
How many MCP servers are there for knowledge base QA?
Electra Index lists 502 active MCP servers for knowledge base QA from the Official MCP Registry. 237 offer a hosted endpoint and 382 publish their source code.
Is there a hosted MCP server for knowledge base QA, with nothing to install?
Yes. ABS · AI Business System, Senzing and Pexafy declare a remote endpoint you add to your assistant's MCP settings.
Is there a ready-made AI agent for knowledge base QA instead?
Yes. If you prefer a finished product to plugging tools into your own assistant, Jamie, Notion Agent and Fathom do this out of the box.
How this list is ordered: a tool comes first when the use case appears in its name rather than only in its description, then when it offers a hosted endpoint, then when its source code is public, then by how recently our robot saw it in the Official MCP Registry. The match to knowledge Base QA comes from the publisher's description (keyword method), not from a test of the tool. Only active tools with a real description are listed. No tool pays to appear here.