"An overview of knowledge graphs and their applications" matching MCP servers:

• knowledge-mcp

  olafgeibig

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  security

  A

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  An MCP server that enables AI agents to query specialized, domain-specific knowledge bases built using the LightRAG framework for enhanced retrieval-augmented generation. It allows for managing and searching knowledge graphs and vector embeddings to provide accurate, context-aware information during an AI assistant's reasoning process.

  Last updated 2026-02-13

  40

  MIT

• YouTube Knowledge MCP

  efikuta

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  security

  F

  license

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  quality

  Transforms YouTube into a queryable knowledge source with search, video details, transcript analysis, and AI-powered tools for summaries, learning paths, and knowledge graphs. Features quota-aware API access with caching and optional OpenAI/Anthropic integration for advanced content analysis.

  Last updated 2025-10-21

  10

  5

  1

• proof-of-commitment

  piiiico

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  security

  F

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  Supply chain risk scoring for npm, PyPI, and GitHub repos

  Last updated 2026-04-16

  1

  MIT

• MCP of MCPs

  eliavamar

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  A

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  A meta-server that aggregates multiple MCP servers into a single interface, reducing token usage by 98%+ through progressive tool discovery and direct code execution that processes data between tools without consuming context window space.

  Last updated 2026-03-18

  16

  9

  Apache 2.0

• mcp-knowledge-graph

  shaneholloman

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  security

  A

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  An improved implementation of persistent memory using a local knowledge graph with a customizable --memory-path. This lets Claude remember information about the user across chats.

  Last updated 2025-12-22

  9

  484

  840

  MIT

• knowledge-rag

  lyonzin

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  security

  A

  license

  A

  quality

  Local RAG system for Claude Code with hybrid search (semantic + BM25), cross-encoder reranking, markdown-aware chunking, and 12 MCP tools. Zero external servers, pure ONNX in-process.

  Last updated 2026-04-06

  12

  38

  MIT

• Knowledge MCP Server

  sven-borkert

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  Provides centralized knowledge management for projects, allowing users to store, search, and maintain project-specific knowledge that persists across sessions.

  Last updated 2025-08-13

  27

  14

  1

  MIT

• Knowledge Graph MCP Server

  aiuluna

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  A

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  Enables creating, managing, analyzing, and visualizing knowledge graphs with support for multiple graph types (topology, timelines, changelogs, requirements, knowledge bases, ontologies) including node/edge management and resource association.

  Last updated 2025-04-17

  15

  29

  1

  MIT

• Chisel Knowledge MCP

  teknologika

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  A

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  Enables building and managing knowledge workspaces with tools for ingesting content from text, clipboard, or URLs and searching organized knowledge bases. Supports multiple configurable workspaces with separate inbox and knowledge directories for structured information management.

  Last updated 2026-04-06

  MIT

• Volterra Knowledge Engine

  duhman

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  A read-only Model Context Protocol server that exposes a semantic knowledge base to AI agents via 27 tools. It enables querying of documents and data integrated from sources like Notion, SharePoint, HubSpot, and Slack.

  Last updated 2026-02-24

  MIT

• TDZ C64 Knowledge

  MichaelTroelsen

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  security

  F

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  quality

  An MCP server for indexing and searching Commodore 64 documentation using full-text, semantic, and fuzzy search across multiple file formats. It enables RAG-based question answering, entity extraction, and interactive timeline or knowledge graph visualizations.

  Last updated 2026-01-10

• mcp-chain-of-thought

  liorfranko

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  security

  A

  license

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  quality

  mcp-chain-of-thought

  Last updated 2025-05-07

  15

  44

  21

  MIT

• recon-fuzz-knowledge

  Recon-Fuzz

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  security

  A

  license

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  quality

  Recon Fuzz Knowledge MCP

  Last updated 2026-04-16

  14

  108

  MIT

• Knowledge Graph Memory Server

  itseasy21

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  A

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  quality

  An implementation of persistent memory for Claude using a local knowledge graph, allowing the AI to remember information about users across conversations with customizable storage location.

  Last updated 2025-08-08

  11

  1,034

  60

  JavaScript

  MIT

• Knowledge Assistant MCP Server

  r2d2helm

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  security

  F

  license

  A

  quality

  Enables Claude Code to interact with Obsidian vaults by providing tools for multi-term searching, reading notes, and exploring tag-based relationships. It allows users to query, analyze, and manage their personal knowledge base directly through natural language.

  Last updated 2026-02-07

  9

• Notion Knowledge MCP Server

  YuHuanHsu

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  security

  F

  license

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  quality

  A Cloudflare Workers-based service that enables intelligent searching, automatic code snippet recording, and statistical analysis of programming knowledge stored in Notion databases.

  Last updated 2025-07-30

• Knowledge Graph MCP Server

  YUChoe

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  security

  F

  license

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  quality

  A TypeScript MCP server for managing persistent knowledge graphs with entities, directional relations, and time-based observations. It enables users to create, search, and track structured information with built-in concurrency control and JSON file storage.

  Last updated 2026-03-30

• Chain of Draft Thinking

  bsmi021

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  security

  A

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  Chain of Draft Server is a powerful AI-driven tool that helps developers make better decisions through systematic, iterative refinement of thoughts and designs. It integrates seamlessly with popular AI agents and provides a structured approach to reasoning, API design, architecture decisions, code r

  Last updated 2025-03-26

  1

  29

  24

  MIT

• Knowledge Graph Memory Server

  yodakeisuke

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  security

  F

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  quality

  This MCP server provides persistent memory integration for chat applications by utilizing a local knowledge graph to remember user information across interactions.

  Last updated 2025-02-02

  9

  93,530

  5

• Trello Knowledge MCP Server

  pscheit

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  security

  A

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  quality

  An MCP server that utilizes Trello as a knowledge base for storing, searching, and retrieving code snippets and notes. It enables full CRUD operations and organized categorization of information using Trello boards and labels.

  Last updated 2025-11-21

  130

  MIT

• Knowledge Base MCP Server

  Leon4s4

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  security

  A

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  A mem0-like memory system for GitHub Copilot that provides persistent knowledge storage and retrieval capabilities using local ChromaDB.

  Last updated 2025-07-18

  MIT

• MCP Knowledge Base Server

  ikungsjl

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  A local document processing server that can index various document formats (PDF, DOCX, TXT, HTML) and answer questions based on their content using the Model Context Protocol.

  Last updated 2025-06-25

  8

• Chain of Thought MCP Server

  beverm2391

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  security

  F

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  quality

  An MCP server that uses Groq's API to expose raw chain-of-thought tokens from Qwen's qwq model, enabling LLMs to think step-by-step before responding.

  Last updated 2025-03-23

  1

  12

• mcp-astgl-knowledge

  Jmeg8r

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  security

  F

  license

  B

  quality

  MCP server for searching and citing ASTGL (As The Geek Learns) articles about MCP servers, local AI, and AI automation. Provides semantic search, direct Q\&A, and topic browsing across 20 authoritative articles with pre-computed embeddings.

  Last updated 2026-04-14

  3

  105

• Shared Knowledge MCP Server

  j5ik2o

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  security

  F

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  quality

  This server enables AI assistants (CLINE, Cursor, Windsurf, Claude Desktop) to share a common knowledge base through Retrieval Augmented Generation (RAG), providing consistent information access across multiple tools.

  Last updated 2025-03-19

  4

• Personal Knowledge MCP Server

  kyodule

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  A

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  Indexes local and enterprise documents to provide a unified personal knowledge base for AI clients via the Model Context Protocol. It supports full-text search across various file formats and integrates with platforms like Feishu and WeChat Work.

  Last updated 2026-03-11

  39

  MIT

• Chain of Draft (CoD) MCP

  stat-guy

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  security

  F

  license

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  quality

  Implements the Chain of Draft reasoning approach to generate minimalistic intermediate reasoning outputs while solving tasks, significantly reducing token usage while maintaining accuracy.

  Last updated 2025-03-04

  7

  13

• Knowledge Graph Memory Server

  deanacus

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  security

  F

  license

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  quality

  A persistent memory server that implements a local knowledge graph using the Kuzu embedded database to store entities, relationships, and observations. It enables AI models to maintain structured long-term context through searchable nodes and comprehensive tag-based organization.

  Last updated 2025-06-25

  6

• Open CLAW Knowledge Distiller

  destinyfrancis

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  security

  F

  license

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  quality

  Converts YouTube and Bilibili videos into structured knowledge articles using local transcription or subtitle extraction combined with AI-powered summarization. It supports multiple summary styles and provides tools to process URLs, track job status, and retrieve results directly within MCP-compatible agents.

  Last updated 2026-03-10

  58

• Symphony of One MCP

  ai-wes

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  security

  F

  license

  -

  quality

  A multi-agent orchestration system that enables multiple Claude instances to collaborate through a centralized hub with a shared workspace and real-time communication. It features integrated task management, role assignment, and persistent memory to facilitate complex, synchronized agent workflows.

  Last updated 2025-07-01

  12

  3

  4

• Knowledge Base MCP Server

  jeanibarz

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  security

  A

  license

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  quality

  Provides tools for listing and retrieving content from different knowledge bases using semantic search capabilities.

  Last updated 2025-12-21

  3

  42

  The Unlicense

• mc-server-clash-of-clans

  Saunved

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  security

  F

  license

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  quality

  MCP server for the Clash of Clans API. Can get player, clan information, analyze ongoing wars, as well as war logs (provided they are public).

  Last updated 2025-04-25

  5

  1

• Dify Knowledge MCP Server

  liiklin

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  security

  A

  license

  -

  quality

  A Model Context Protocol server that enables AI assistants like Cursor to directly query and retrieve information from Dify knowledge bases through natural language.

  Last updated 2026-01-28

  2

  7

  4

  MIT

• MCP Knowledge Base Server

  dannwaneri

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  security

  F

  license

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  quality

  Provides semantic search and data retrieval capabilities over a knowledge base with multiple tools including keyword search, category filtering, and ID-based lookup with in-memory caching.

  Last updated 2025-12-03

  5

• YouTube Knowledge Base MCP

  Miandari

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  security

  F

  license

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  quality

  Builds a searchable knowledge base from YouTube video transcripts with hybrid semantic and keyword search. Allows LLM assistants to search, organize, and retrieve timestamped information from videos you've watched.

  Last updated 2025-12-06

  3

• Cardiology Knowledge Graph MCP

  ryoureddy

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  security

  F

  license

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  quality

  Builds and manages a cardiology-focused knowledge graph in Neo4j by extracting medical entities and relationships from documents using LLMs. It enables users to ingest PDFs, refine extracted data, and perform natural language queries to gain clinical insights.

  Last updated 2025-07-21

• Chain of Draft Prompt Tool

  brendancopley

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  security

  F

  license

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  quality

  Transforms prompts into Chain of Draft (CoD) or Chain of Thought (CoT) format to enhance LLM reasoning quality while reducing token usage by up to 92.4%, supporting multiple LLM providers including Claude, GPT, Ollama, and local models.

  Last updated 2025-09-08

  10

  18

• OpenAI SDK Knowledge MCP

  seratch

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  security

  A

  license

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  quality

  An MCP server that provides deep knowledge about OpenAI APIs and SDKs, enabling users to query technical information through various MCP clients including ChatGPT Deep Research, Cursor, and OpenAI Responses API.

  Last updated 2025-07-13

  15

  MIT

• Code Knowledge MCP Server

  davidvc

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  security

  F

  license

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  quality

  Provides a project memory bank and RAG context provider for enhanced code understanding and management through vector embeddings, integrated with RooCode and Cline.

  Last updated 2025-02-28

  22

• MCP Knowledge Base Server

  maxsmosarski

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  security

  F

  license

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  quality

  Enables semantic search and document management with support for text, PDF, and image uploads using your own Supabase database and OpenAI API keys. Supports multi-tenant deployment on Cloudflare Workers or local hosting.

  Last updated 2025-08-20

• Usage And Billing MCP Server

  BACH-AI-Tools

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  security

  A

  license

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  quality

  Enables access to Usage and Billing APIs for managing accounts, products, meters, plans, and usage reporting. Supports operations like creating products/plans, reporting usage, and retrieving billing information.

  Last updated 2025-12-07

  18

  MIT

• Account and Transaction MCP

  ag2-mcp-servers

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  security

  F

  license

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  quality

  An MCP Server that provides a conversational interface to the UK Open Banking account information API, allowing agents to interact with bank account data through natural language commands.

  Last updated 2025-07-16

• mcp-animal-of-the-day

  punkpeye

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  security

  A

  license

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  quality

  Explore a new amazing animal every single day!

  Last updated 2025-11-08

  1

  21

  MIT

• Adaptive Graph of Thoughts MCP

  SaptaDey

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  security

  A

  license

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  quality

  A scientific reasoning framework that leverages graph structures and the Model Context Protocol (MCP) to process complex scientific queries through an Advanced Scientific Reasoning Graph-of-Thoughts (ASR-GoT) approach.

  Last updated 2026-03-24

  30

  MIT

• Divide and Conquer MCP Server

  landicefu

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  security

  A

  license

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  quality

  Enables AI agents to break down complex tasks into manageable pieces using a structured JSON format with task tracking, context preservation, and progress monitoring capabilities.

  Last updated 2025-06-26

  15

  28

  7

  MIT

• Dify External Knowledge MCP

  funtuan

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  security

  A

  license

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  quality

  Integrates Dify's external knowledge base API with the Model Context Protocol to enable AI agents to retrieve and query relevant information. It supports relevance scoring, metadata filtering, and flexible configuration through environment variables or command-line arguments.

  Last updated 2025-11-14

  1

  11

  MIT

• Obsidian Knowledge Management

  TheOutcastVirus

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  security

  F

  license

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  quality

  Enables LLMs to read, search, and manage Obsidian vault markdown files, including YAML frontmatter, wikilinks, and graph operations through a secure stateless I/O layer.

  Last updated 2026-03-25

• GCP Billing and Monitoring MCP

  RadiumGu

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  security

  A

  license

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  quality

  Enables interaction with Google Cloud services including billing cost analysis, log querying, and metrics monitoring through natural language commands. Provides comprehensive tools for managing GCP resources, analyzing costs, detecting anomalies, and retrieving operational insights.

  Last updated 2025-12-15

  40

  1

  Apache 2.0

• Unreal Engine Knowledge Graph

  yarnovo

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  security

  F

  license

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  quality

  Enables intelligent exploration of Unreal Engine documentation through a Neo4j-based knowledge graph. Supports concept relationship searches, learning path discovery, and dependency tracking between engine features using bilingual Chinese-English queries.

  Last updated 2025-06-16

  8

  5

• Google Calendar and Meet MCP

  INSIDE-HAIR

  A

  security

  F

  license

  -

  quality

  Enables comprehensive Google Meet and Calendar management through Google Calendar API v3 and Google Meet API v2, supporting calendar event creation with Meet links, space management, transcription, recording, attendance tracking, and meeting moderation controls.

  Last updated 2025-08-29

  24

  2