MCP servers

Open-source MCP servers

MCP, the Model Context Protocol, is an open standard for connecting AI assistants to outside tools and data. An MCP server exposes something, such as a database, a browser, a GitHub account or a folder of files, as tools the assistant can call. Clients such as Claude Desktop, Cursor and VS Code load these servers.

How to choose

Check what a server can reach before you install it. One that can run shell commands or write files has all the power of the account it runs under, so prefer servers that ask for the narrowest access: read-only tokens and a single folder. Also check whether it runs locally over stdio or as a remote service you would have to trust.

Most-starred projects

385–408 of 581

sandbaseai

sandbase-harness

★ 647

Local-first, self-hosted AI agent runtime and MCP bridge with sandboxed sessions, memory, credentials, audit/replay, and a local Console.

TypeScript

prajwalshettydev

UnrealGenAISupport

★ 646

Unreal Engine plugin for LLM/GenAI models & MCP UE5 server. OpenAI GPT-5, Deepseek R1, Claude Opus/Sonnet, Gemini 3, Grok 4, Alibaba Qwen, Kimi, ElevenLabs TTS, Inworld, OpenRouter, Groq, GLM, Ollama, Local, Meshy, Tripo, Hunyuan3D, Rodin, fal, Dashscope, Seedream. NPC AI, agentic, chat, 3D gen, TTS, multimodal, image gen. UnrealMCP/UnrealClaude

C++

marc-shade

world-intel-mcp

★ 643

120-tool MCP server for real-time global intelligence: markets, SEC filings, conflict, military, cyber, climate, news, and 30+ domains. AI situation briefs that cite their sources, user-defined geofences with escalation scoring, cited daily digests, live SSE dashboard. MIT, no paid API keys.

Python

manojmallick

sigmap

★ 638

~97% token reduction for AI coding sessions — zero deps, 33 languages, MCP server

JavaScript

hustcc

mcp-mermaid

★ 636

❤️ Generate mermaid diagram and chart with AI MCP dynamically.

TypeScript

kentcdodds

kody

★ 635

🐨 Your assistant's home — the memory, keys, code, and automations your AI agent keeps, portable across every MCP host. Built on Cloudflare Workers.

TypeScript

java-up-up

nexus-agent

★ 634

企业级 AI 智能体 Agent 平台，覆盖智能对话、文档知识问答、联网搜索、RAG 检索、MCP 工具协议、Skills 扩展等完整能力。三层执行器体系、双通道混合检索、组合式切块引擎、会话记忆管理、全链路可观测，每个环节都经过深度设计和工程化打磨。

Java

calmrocks

ai-engineer-notebooks

★ 633

Hands-on, framework-free Colab notebooks for the AI Engineer / Forward Deployed Engineer (FDE) skill set — model APIs, structured output, tool calling, RAG, evals-as-the-spine, agents (loop from scratch, tool design, guardrails, MCP, Skills), fine-tuning vs LoRA, prompt-injection/security, LLMOps, and customer craft. Runs on the free Groq API.

Jupyter Notebook

genomoncology

biomcp

★ 633

BioMCP: Biomedical Model Context Protocol

Rust

GoogleCloudPlatform

cloud-run-mcp

★ 631

MCP server to deploy apps to Cloud Run

JavaScript

tuannvm

codex-mcp-server

★ 630

MCP server wrapper for OpenAI Codex CLI that enables Claude Code to leverage Codex's AI capabilities directly.

TypeScript

Coolver

home-assistant-vibecode-agent

★ 628

Home Assistant MCP server agent. Enable Claude Code, Cursor, VS Code or any MCP-enabled IDE to help you vibe-code and manage Home Assistant: create and debug automations, design dashboards, tweak themes, modify configs, and deploy changes using natural language

Python

danielealbano

android-remote-control-mcp

★ 626

An MCP Server for Android running on the phone, optmized for token usage, supports also files downloads and cloudflare and ngrok automated tunnelling.

Kotlin

Dakkshin

after-effects-mcp

★ 624

MCP Server for Adobe After Effects. Enables remote control (compositions, text, shapes, solids, properties) via the Model Context Protocol using ExtendScript.

JavaScript

redis

mcp-redis

★ 623

The official Redis MCP Server is a natural language interface designed for agentic applications to manage and search data in Redis efficiently

Python

Snailclimb

AIGuide

★ 621

AI 应用开发、AI 编程实战与面试指南，涵盖 LLM、Agent、RAG、MCP、Claude Code、Codex 等核心技术与工程实践。

hashgraph-online

hol-guard

★ 620

Open-source antivirus for AI agents: block risky tools, secret access, prompt injection, malicious packages, MCP servers, plugins, and skills at runtime.

Python

sno-ai

mda

★ 618

MDA Open Spec — a Markdown superset for agent-facing documents. One .mda source compiles to drop-in SKILL.md, AGENTS.md, MCP-SERVER.md, and CLAUDE.md. JSON Schema validated, with typed dependency graph, footnote relationships, and Sigstore-anchored signatures. For agentskills.io and AAIF runtimes.

TypeScript

beihaili

Get-Started-with-Web3

★ 616

Open-source bilingual AI-native Web3 curriculum: wallets, Bitcoin, Ethereum, DeFi, L2, DAO, smart accounts, llms.txt and MCP

JavaScript

varunneal

spotify-mcp

★ 614

MCP to connect your LLM with Spotify.

Python

ggozad

haiku.rag

★ 608

Agentic RAG for local and self-hosted document search: hybrid retrieval, reranking and multimodal RAG on embedded LanceDB, with Docling parsing and an MCP server

Python