Source: https://seerepo.com/uses/mcp
Markdown source: https://seerepo.com/uses/mcp.md
Description: 12 public repos that SeeRepo read use MCP. It's used most with React, Vite, and Anthropic.

# 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

- [React](https://seerepo.com/uses/mcp+react): 10 repos
- Vite: 7 repos
- Anthropic: 5 repos
- Next.js: 5 repos
- PostHog: 5 repos
- OpenAI: 4 repos
- Postgres: 3 repos
- GitHub: 2 repos

## The repos, by stars

1. [deepseek-ai/deepseek-harness](https://seerepo.com/r/deepseek-ai/deepseek-harness): TypeScript · 262,598 stars · 12.9% signed by AI — DeepSeek Harness: Everything is a Plugin.
2. [react/react](https://seerepo.com/r/react/react): JavaScript · 251,887 stars · 0.2% signed by AI — The library for web and native user interfaces.
3. [anomalyco/opencode](https://seerepo.com/r/anomalyco/opencode): TypeScript · 221,987 stars · 0.3% signed by AI — The open source coding agent.
4. [shadcn-ui/ui](https://seerepo.com/r/shadcn-ui/ui): TypeScript · 126,639 stars · 3% signed by AI — Composable, accessible components with thoughtful defaults. Build your own component library with code you can customize, extend, and make your own.
5. [JuliusBrussee/caveman](https://seerepo.com/r/JuliusBrussee/caveman): Go · 115,376 stars · 74.4% signed by AI — 🪨 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](https://seerepo.com/r/supabase/supabase): TypeScript · 114,077 stars · 1.9% signed by AI — The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.
7. [thedotmack/claude-mem](https://seerepo.com/r/thedotmack/claude-mem): TypeScript · 103,531 stars · 61.1% signed by AI — 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](https://seerepo.com/r/ChatGPTNextWeb/NextChat): TypeScript · 88,900 stars · 1.9% signed by AI — ✨ 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](https://seerepo.com/r/ruvnet/ruflo): TypeScript · 79,691 stars · 36.2% signed by AI — 🌊 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](https://seerepo.com/r/cline/cline): TypeScript · 70,919 stars · 2.2% signed by AI — Autonomous coding agent as an SDK, IDE extension, or CLI assistant.
11. [code-yeongyu/oh-my-openagent](https://seerepo.com/r/code-yeongyu/oh-my-openagent): TypeScript · 70,393 stars · 3.8% signed by AI — OmO: Just type "mass ulw" keyword with your prompt. Now you are the master of graph engineering.
12. [Mintplex-Labs/anything-llm](https://seerepo.com/r/Mintplex-Labs/anything-llm): JavaScript · 67,640 stars · 0.4% signed by AI — 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](https://github.com/deepseek-ai/deepseek-harness)

### 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](https://seerepo.com/uses/mcp+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](https://seerepo.com/r/JuliusBrussee/caveman/ai)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.