Best Graph AI Skills & MCP Servers

Agent-first MCP server: AI coding agents find, compare, verify, and stack-build the right open-source tools across 35+ registries (npm, PyPI, Cargo, Maven, Go, RubyGems, NuGet, Hex, Composer, and more). Graph-aware ranking + version-aware compatibility in

Tuning Engines CLI, MCP server, and Python agent runtime adapters for governed model, agent, skill, and MCP workflows. Fine-tune open-source LLMs, run inference, manage datasets/evaluations, and connect LangGraph or Temporal while Tuning Engines handles p

Your AI agent has read your codebase but still can't safely change it. unerr is a local guardrail that hands the agent the call graph and your rules at the moment it edits.

MCP server for Decantr — exposes Contract context, typed graph artifacts, and verification evidence to AI coding assistants

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.

Search and query 8,933 Eurostat datasets — EU economy, demography, trade, health, and NUTS regional data via MCP. STDIO or Streamable HTTP.

MCP server that builds code graphs to provide rich context to LLMs

MCP server for the Agent Passport System — protocol-layer tools only. 150 tools (132 protocol + 10 gateway deprecation stubs). Identity, delegation, reputation, attestation, coordination, commerce, attribution primitive, attribution settlement. Tracks SDK

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.

Search engine for agent commerce: find, rank, inspect, and call agent-usable APIs via MCP, plugins, skills, and TypeScript

A code indexing system accessible via MCP (Model Context Protocol)

MCP server + CLI for the Unified Product Graph; drop into Claude Code or use the `upg` command.

Multi-language code graph memory system for LLMs

Query U.S. Census Bureau data, variables, and geography via MCP. STDIO or Streamable HTTP.

AI-powered video generation engine. MCP server and SDK for creating motion graphics from prompts.

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

Structured fact memory MCP server — SQLite + FTS5, trust scoring, entity graph, bilingual retrieval for Claude Code & Codex

MCP server that gives AI agents (Claude, Cursor, Copilot) deep understanding of your codebase patterns, conventions, and architecture. Query patterns, security boundaries, call graphs in real-time.

MCP server for AgentPlanner — AI agent orchestration with planning, dependencies, knowledge graphs, and human oversight

OpenCodeHub — stdio MCP server exposing code-graph + group tools

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.

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.

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