Tools · Knowledge Base QA
Best MCP servers for knowledge base QA
504 MCP servers in the Official MCP Registry do knowledge base QA. 239 can be used as a hosted endpoint, with nothing to install, and 382 publish their source code.
| # | Tool | Relevance | Connect | Code | Seen |
|---|---|---|---|---|---|
| 451 | contextual-mcp-server RAG-enabled MCP server using Contextual AI. Supports single-agent and multi-agent modes. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 452 | Octocode AI-powered code indexer with semantic search and knowledge graphs | In description semantic search | HOSTEDLOCAL | Open | 3d ago |
| 453 | Octobrain Persistent memory for AI assistants with semantic search and knowledge graph relationships. | In description semantic search | HOSTEDLOCAL | Open | 3d ago |
| 454 | dubstrata Dubstrata: Causal Financial & Narrative CDN providing Graph RAG & Deep Research Reports | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 455 | citecite-mcp Inject, parse, and strip [N] citation markers in RAG outputs. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 456 | Pipe (SPR) MCP Server AI-native runtime with built-in MCP server. 232 builtins, AI pipelines, RAG, single ~8 MB binary. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 457 | ComfyUI Builder ComfyUI MCP server: knowledge base, workflow builder, real-time execution, models, plugins. | In description knowledge base | HOSTEDLOCAL | Open | 3d ago |
| 458 | Copilot Memory MCP Persistent semantic memory for AI agents using local ChromaDB vector search. No cloud required. | In description vector search | HOSTEDLOCAL | Open | 3d ago |
| 459 | loom Local-first personal knowledge base. Cited answers from your vault via vector + graph retrieval. | In description knowledge base | HOSTEDLOCAL | Open | 3d ago |
| 460 | loci Cross-session memory and hybrid RAG over your notes and docs. Local-first, with cited answers. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 461 | mcp-file-processor Text extraction, keyword extraction, language detection, and chunking for RAG | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 462 | memograph Graph-based memory system for LLMs with knowledge graphs and semantic search. | In description semantic search | HOSTEDLOCAL | Open | 3d ago |
| 463 | IMAGIN.studio API Docs Semantic search over IMAGIN.studio API documentation — CDN, API, integration guides, and more. | In description semantic search | HOSTEDLOCAL | Open | 3d ago |
| 464 | marocain.investments — {GIN} real-estate intelligence (Morocco) {GIN} verdict, M-Value AVM, market facts + semantic search for Moroccan real estate. Moat-safe. | In description semantic search | HOSTEDLOCAL | Open | 3d ago |
| 465 | ragstack Search, chat, upload, and scrape a serverless RAGStack knowledge base on AWS. | In description knowledge base | HOSTEDLOCAL | Open | 3d ago |
| 466 | google-surf-mcp Web, academic and code search with graph RAG, data lineage, ontology and cross-project schema links. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 467 | guard-core-mcp Guard Core security MCP: SecurityConfig validation, docs search, live threat detection. | In description docs search | HOSTEDLOCAL | Open | 3d ago |
| 468 | woody-mcp Woody, the AI firearms expert. Verified specs, legal lookups, and knowledge base. | In description knowledge base | HOSTEDLOCAL | Open | 3d ago |
| 469 | gctrl Governed graph-native agent memory: knowledge extraction, fusion, hybrid RAG, scoped access tokens. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 470 | stellavault Local-first MCP server: Claude searches, asks & drafts from your Obsidian vault. 21 tools, no keys. | In description obsidian | HOSTEDLOCAL | Open | 3d ago |
| 471 | Paper Distill MCP Academic paper search across 11 sources with AI curation, ranked push, Zotero and Obsidian support. | In description obsidian | HOSTEDLOCAL | Open | 3d ago |
| 472 | hubmesh Deterministic multi-hop graph retrieval for RAG. Zero LLM calls in the query path. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 473 | Shelfmark Local, privacy-first document catalogue for AI agents: metadata-only discovery, no cloud, no RAG. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 474 | cortex Local repo context for coding assistants with semantic search and graph relationships. | In description semantic search | HOSTEDLOCAL | Open | 3d ago |
| 475 | github-twin Personal RAG over your GitHub history (commits, code, reviews), served to Claude Code over MCP. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 476 | ariel-memory Two-layer memory MCP server for AI agents with 37 tools, RAG, graphs, wiki, auth | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 477 | beever-atlas Open-source LLM knowledge base: team chat into a typed knowledge graph and auto-generated wiki. | In description knowledge base | HOSTEDLOCAL | Open | 3d ago |
| 478 | Memory Kernel Local-first memory for AI agents: SQLite FTS5, deterministic recall, no vector DB, no cloud. | In description vector db | HOSTEDLOCAL | Open | 3d ago |
| 479 | AsterMind MCP On-device reranking that cuts RAG context tokens ~67% while keeping a relevant passage. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 480 | Embgrep Local semantic search — embedding-powered grep for files, zero external services. | In description semantic search | HOSTEDLOCAL | Open | 3d ago |
| 481 | vibe-hnindex Index source code into a local knowledge base, search with keyword + semantic + hybrid modes. | In description knowledge base | HOSTEDLOCAL | Open | 3d ago |
| 482 | Citadel Encrypted-first embedded database with vector search and agent memory, exposed as MCP tools | In description vector search | HOSTEDLOCAL | Open | 3d ago |
| 483 | Qdrant RBAC Role-based access to your Qdrant vector store, via MCP. OIDC in, scoped JWTs out. | In description vector store | HOSTEDLOCAL | Open | 3d ago |
| 484 | opensolr-mcp Managed Apache Solr for agents: hybrid BM25+kNN search, server-side embeddings, RAG answers | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 485 | castor-mcp Castor for Confluence Data Center — MCP server bridging Confluence DC with AI agents | In description confluence | HOSTEDLOCAL | Open | 3d ago |
| 486 | kogcat-mcp Local-first judgment layer: counter-examples & blind spots from your own knowledge base. | In description knowledge base | HOSTEDLOCAL | Open | 3d ago |
| 487 | FAQai Turn any document into a production-ready RAG dataset from Claude, Cursor, or any MCP host. | In description rag | HOSTEDLOCAL | Open | 3d ago |
| 488 | deepcontext Advanced codebase indexing and semantic search MCP server | In description semantic search | HOSTEDLOCAL | Open | 3d ago |
| 489 | FlowDot Build and run AI workflows, apps, toolkits and knowledge bases on FlowDot from any MCP client. | In description knowledge bases | HOSTEDLOCAL | Open | 3d ago |
| 490 | Terraform Ingest MCP Ingest and analyze Terraform modules from multiple repositories for AI RAG systems | In description rag | HOSTEDLOCAL | — | 3d ago |
| 491 | FO Semantic MCP Semantic search over 50,000+ Dynamics 365 F&O artifacts: tables, forms, classes, and more. | In description semantic search | HOSTEDLOCAL | — | 3d ago |
| 492 | nexo Cognitive memory for AI agents. Atkinson-Shiffrin, RAG, knowledge graph. 100+ tools. | In description rag | HOSTEDLOCAL | — | 3d ago |
| 493 | memforge-memory Team engineering memory for AI coding assistants. 47 MCP tools, pgvector semantic search. | In description semantic search | HOSTEDLOCAL | — | 3d ago |
| 494 | n0s1-mcp Secret scanner for Slack, Jira, Confluence, Asana, Wrike, Linear, Zendesk, GitHub and GitLab | In description confluence | HOSTEDLOCAL | — | 3d ago |
| 495 | InnoDay Unified ticketing MCP server for Jira, Linear, Trello, Notion, and GitHub Issues. | In description notion | HOSTEDLOCAL | — | 3d ago |
| 496 | MantisBT MCP Server MantisBT MCP server – manage issues, notes, files, tags, and relationships. With semantic search. | In description semantic search | HOSTEDLOCAL | — | 3d ago |
| 497 | Bookmark Lens Local-first bookmark management with semantic search and AI-powered organization | In description semantic search | HOSTEDLOCAL | — | 3d ago |
| 498 | nol-mcp nol MCP server -- search, cited Q&A, and pages over your team's knowledge base | In description knowledge base | HOSTEDLOCAL | — | 3d ago |
| 499 | dockase-legal-mcp Nigerian & Commonwealth legal reasoning, RAG search, contract analysis, and citation verification. | In description rag | HOSTEDLOCAL | — | 3d ago |
| 500 | vector-memory Semantic document memory using Redis vector store. Save and recall files with natural language. | In description vector store | HOSTEDLOCAL | — | 3d ago |
FAQ
How many MCP servers are there for knowledge base QA?
Electra Index lists 504 active MCP servers for knowledge base QA from the Official MCP Registry. 239 offer a hosted endpoint and 382 publish their source code.
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 its description covers more aspects of the use case, 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.