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

  • knowledge-mcp

    olafgeibig
    A
    license
    -
    quality
    C
    maintenance
    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.
    59
    MIT

  • knowledge-rag

    lyonzin
    A
    license
    A
    quality
    A
    maintenance
    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.
    13
    252
    MIT

  • agent-knowledge

    yucx-go
    A
    license
    A
    quality
    C
    maintenance
    Long-term memory for AI agents. Compiles conversations into a structured knowledge base with Claim/Evidence model, source provenance, append-only timeline, and contradiction detection. Multi-path retrieval (Exact + BM25 + Graph + weighted RRF + reranker) — 96.6% R@5 on LongMemEval-S, zero vector dependencies.
    8
    3
    MIT

  • Knowledge MCP

    ggirardi1
    F
    license
    A
    quality
    B
    maintenance
    An MCP server that acts as a knowledge engine for software projects, delivering relevant context at the start of a task and accumulating knowledge at its end through tools like start_task, context, finish_task, remember, and search, with a file-based source of truth and optional semantic retrieval via Graphiti/Neo4j.
    5

  • YouTube Knowledge MCP

    efikuta
    A
    license
    B
    quality
    D
    maintenance
    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.
    10
    18
    1
    MIT

  • dnomia-knowledge

    ceaksan
    A
    license
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    quality
    D
    maintenance
    Local knowledge engine for codebases with hybrid search, knowledge graph, and interaction tracking, enabling Claude Code to search and interact with project knowledge locally.
    1
    MIT

  • knowledge-base

    riemannulus
    A
    license
    -
    quality
    C
    maintenance
    A knowledge base MCP server that aggregates team knowledge from multiple sources into Postgres. It provides hybrid search (full-text + vector + RRF) via MCP tools, and enables direct recording of decisions, learnings, and pitfalls.
    MIT

  • hermes-knowledge-ingestion

    lyc403223157-source
    A
    license
    -
    quality
    A
    maintenance
    Enables saving URLs, local files, plain text, and platform content (WeChat, X, YouTube, PDF, images, audio/video, Telegram) as structured Markdown knowledge cards in an Obsidian vault, with optional AI-powered classification and tagging.
    49
    Apache 2.0

  • Knowledge

    fulminate-io
    A
    license
    -
    quality
    A
    maintenance
    A local MCP server that gives LLMs long-term memory by indexing code, infrastructure, logs, and docs into a queryable graph. It enables semantic and structural search, evidence-backed reasoning, and tracked plans that persist across sessions and teams.
    6
    Apache 2.0

  • personal-knowledge

    pcamarajr
    A
    license
    -
    quality
    B
    maintenance
    A portable, AI-agnostic second brain that stores typed memories with semantic recall and self-learning re-ranking, exposed to any MCP-capable AI as a local server.
    21
    MIT