Best Open Source model context protocol Libraries
A curated list of the most popular GitHub repositories tagged with model context protocol. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.
#1morluto/rea
Reverse engineer anything with agents, from app behavior down to native binaries.
#2PrefectHQ/fastmcp
🚀 The fast, Pythonic way to build MCP servers and clients.
#3xerj-org/xerj
Local-first search engine and MCP server for AI agents. One Rust binary indexes code, docs, logs, JSONL/CSV and PDFs for BM25 full-text, vector and hybrid search, code search without grep, agent memory and RAG. Elasticsearch-compatible API; Corpus Hub serves hundreds of reference memory corpora.
#4microsoft/mcp-for-beginners
This open-source curriculum introduces the fundamentals of Model Context Protocol (MCP) through real-world, cross-language examples in .NET, Java, TypeScript, JavaScript, Rust and Python. Designed for developers, it focuses on practical techniques for building modular, scalable, and secure AI workflows from session setup to service orchestration.
#5TykTechnologies/tyk
Open Source API and AI Gateway supporting REST, GraphQL, TCP, gRPC and MCP (Model Context Protocol)
#6mcp-use/mcp-use
The fullstack MCP framework to develop MCP Apps for ChatGPT / Claude & MCP Servers for AI Agents.
#7maximhq/bifrost
Open-source, high-performance AI gateway that works as your LLM gateway, MCP gateway and agent gateway. One OpenAI-compatible API for 10,000+ models, with failover, load balancing, semantic caching, virtual keys, budgets and MCP Code Mode. Works with any SDK or agent and adds under 200µs of overhead at 5k RPS.
#8homeassistant-ai/ha-mcp
The Unofficial and Awesome Home Assistant MCP Server
#9getsentry/XcodeBuildMCP
A Model Context Protocol (MCP) server and CLI that provides tools for agent use when working on iOS and macOS projects.
#10CrossPaste/crosspaste-desktop
Cross-device clipboard sync for macOS, Windows & Linux — end-to-end encrypted, LAN-only, no cloud. OCR, CLI and MCP server built in.
#11awslabs/cli-agent-orchestrator
Multi-agent orchestration for AI coding CLIs — Claude Code, Kiro, Codex, and more, coordinated in isolated tmux sessions
#12reticlehq/reticle
AI agents can generate code, but still struggle to understand what they build. Reticle brings Jev-style machine-native runtime perception to web & desktop applications.
#13HelpCode-ai/anythingmcp
MCP gateway for AI agents: turn any REST/OpenAPI, GraphQL, SOAP or SQL API into MCP tools. 547 ready-made connectors (SAP, ERP, e-commerce) with RBAC, SSO, audit logs and a knowledge graph.
#14WeftCut/WeftCut
Free, open-source AI video editor for macOS, Windows and Linux — drive the whole timeline from any MCP client.
#15FunplayAI/funplay-unity-mcp
The Most Advanced MCP Server for Unity Editor with execute_code, prompts/resources, input simulation, screenshots, and play mode automation.
#16saigontechnology/AgentCrew
Chat application with multi-agents system supports multi-models and MCP
#17codeofaxel/Kiln
Describe it or draw it — Kiln makes it real. The open-source MCP server for 3D printing: AI agents (ChatGPT, Claude, Codex, Cursor, Gemini, Grok, or any MCP client) design, generate, slice & print on Bambu Lab, Creality, Prusa, Elegoo, Klipper/Moonraker, OctoPrint, Duet/RepRapFirmware & any Marlin printer.
#18gebruder/wirken
The enterprise gateway for autonomous agents. Identity management, per-channel isolation, credential vault, per-session tamper-evident audit log.
#19LGDiMaggio/predictive-maintenance-mcp
An open-source MCP server that turns LLMs into condition monitoring assistants for reliability engineers. It gives your AI assistant evidence-based vibration diagnostics: machine fault detection, severity assessment and diagnostic reports, for faster predictive maintenance decisions. Also available as a Claude Code plugin.
#20tunr-dev/tunr
The network layer for AI agents. Reach your customers' on-prem data, show what you build, keep it running — through one relay that your machines only ever dial out to. Plus tunnels and deploys.
#21TAJD/projektor
Self hosted Wiki + Jira-style AI native issue tracker on Cloudflare Workers