Who uses it
Open source repos that use MCP
12 public repos that SeeRepo read use MCP. It's used most with React, Vite, and Anthropic.
Used most with
- React10 repos
- Vite7 repos
- Anthropic5 repos
- Next.js5 repos
PostHog5 repos
OpenAI4 repos- Postgres3 repos
- GitHub2 repos
The repos, by stars
- 1.deepseek-ai/
deepseek-harness DeepSeek Harness: Everything is a Plugin.
- 2.react/
react The library for web and native user interfaces.
- 3.
- 4.shadcn-ui/
ui Composable, accessible components with thoughtful defaults. Build your own component library with code you can customize, extend, and make your own.
- 5.JuliusBrussee/
caveman 🪨 why use many token when few token do trick. Viral skill + proxy for coding agents that cuts 65% of tokens by talking like a caveman.
- 6.supabase/
supabase The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.
- 7.thedotmack/
claude-mem Persistent Context Across Sessions for Every Agent – Captures everything your agent does during sessions, compresses it with AI, and injects relevant context back into future sessions. Works with Claude Code, OpenClaw, Codex, Gemini, Hermes, Copilot, OpenCode + More
- 8.ChatGPTNextWeb/
NextChat ✨ Zero-config AI chat assistant. No API key needed — sign up and instantly chat with GPT-5, Claude 4, Gemini 2.5, DeepSeek & 100+ top models. Pay-as-you-go saves you more. Available on Web, iOS, macOS, Android, Linux, Windows.
- 9.ruvnet/
ruflo 🌊 The original agent harness. Deploy intelligent multi-player swarms, coordinate autonomous workflows, and build conversational AI systems. Features adaptive memory, self-learning intelligence, federation, vector RAG integration, and native Claude Code / Codex / Hermes and many more Integrated
- 10.cline/
cline Autonomous coding agent as an SDK, IDE extension, or CLI assistant.
- 11.code-yeongyu/
oh-my-openagent OmO: Just type "mass ulw" keyword with your prompt. Now you are the master of graph engineering.
- 12.Mintplex-Labs/
anything-llm Stop renting your intelligence. Own it with AnythingLLM. Everything you need for a powerful local-first agent experience
Frequently asked questions
- What is the most popular open source repo that uses MCP?
- deepseek-ai/deepseek-harness, with 262,598 stars on GitHub.
- The proof: deepseek-ai/deepseek-harness on GitHub
- What other technologies is MCP used with?
- With React (10), Vite (7), Anthropic (5), Next.js (5), and PostHog (5), out of the 12 repos that use it.
- The proof: the repos that use MCP and React
- What languages are the repos that use MCP written in?
- TypeScript (9), JavaScript (2), and Go (1).
- How many repos that use MCP have commits signed by AI?
- 12 of the 12; the most, JuliusBrussee/caveman, with 74.4% of its commits.
- The proof: the commits each tool signed in JuliusBrussee/caveman
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