Best Knowledge Graph AI Skills & MCP Servers

AI Memory & Knowledge Management MCP Server — 32 tools, BM25 R@5=95%, hybrid search (RRF), knowledge graph, analytics, cloud sync, Obsidian compatible. Works with Claude Code, Cursor, Gemini CLI, Windsurf, hermes-agent.

Information-geometric agent memory with mathematical guarantees. 4-channel retrieval, Fisher-Rao similarity, zero-LLM mode, EU AI Act compliant. Works with Claude, Cursor, Windsurf, and 17+ AI tools.

Local-first code intelligence CLI for unerr

Shared, persistent memory for AI assistants, built on the Zettelkasten method.

MCP tools that search, write, and auto-link your Obsidian vault — and learn from your edits.

MIND MCP Server — 28 tools. The most complete AI memory layer with the Focus → Project → Outcome → Task hierarchy (mind_focuses + extended mind_life with item_type/parent_id/focus_id and cross-account project sharing via share/list_shares/revoke_share), d

Developer context continuity system — temporal knowledge graph for AI coding agents via MCP. Inspired by Vannevar Bush's 1945 concept of a machine that remembers everything.

Nex CLI provides organizational context & memory to AI agents. Connect email, CRM, Slack, meetings, and 100+ tools into one knowledge graph. Delegates to the nex-cli binary.

Bhived MCP Server — shared knowledge graph for AI agents. Query, write, and inspect collective AI knowledge through the Model Context Protocol.

Model Context Protocol (MCP) server for LightRAG - 30 fully working tools with complete RAG and Knowledge Graph integration

Cognitive architecture for persistent AI agent memory. Knowledge graph with learning retrieval, ACT-R decay, and spreading activation. Markdown-native, local-first, zero cloud. MCP server + CLI.

Persistent memory for AI coding agents. Knowledge graph with 4-tier taxonomy, confidence scoring, and MCP protocol support for Claude Code, Cursor, Gemini CLI, Windsurf, Cline, Codex, and OpenCode.

Personal Knowledge Brain for developers — MCP server with typed neurons, hybrid search (FTS5 + vector), knowledge graph, vault encryption, time-travel history, and spaced repetition. 100% local, SQLite-based.

Alaya MCP Server — a memory engine for AI agents that remembers, forgets, and learns

Verifiable Memory-as-a-Service for AI Agents — MCP server with local SQLite or cloud mode

DEPRECATED — install the Claude Code plugin at gramatr/claude-plugin instead. This npm package no longer ships a CLI; Codex and Gemini integrations are paused pending HTTPS+OAuth MCP support.

Graph-powered code intelligence for AI agents. Index any codebase, query via MCP or CLI.

MCP server for Neruva -- reliability infrastructure for production AI agents. One install, agent stops forgetting / drifting / repeating mistakes, every failure replayable bit-for-bit. v0.27 ships the qbound KG engine: 47.5% EM on MemoryAgentBench CR-MH (

Standalone Node MCP server: semantic search + knowledge graph + vault editing for Obsidian, no plugin required.

DARE Framework - CLI, GraphRAG engine, MCP server and shared types in a single package

MCP server for the Polarity exocortex. Read and write your personal knowledge graph from any LLM client.

MeMesh — Local memory for Claude Code and MCP coding agents. One SQLite file, zero cloud required.

Standalone MCP server for Copass — drop-in discover/interpret/search + Context Window tools for any MCP client (Claude Agent SDK, Claude Code, Claude Desktop, Cursor)

Fabric MCP server — code intelligence, governance rules, and cloud-sync disaster recovery over a local codebase index