Zen has been huge for me. Having Claude bounce ideas off of Gemini has led to a much more consistent experience. Answer from AndroidAssistant on reddit.com
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GitHub
github.com › BeehiveInnovations › pal-mcp-server
GitHub - BeehiveInnovations/pal-mcp-server: The power of Claude Code / GeminiCLI / CodexCLI + [Gemini / OpenAI / OpenRouter / Azure / Grok / Ollama / Custom Model / All Of The Above] working as one.
Your AI's PAL – a Provider Abstraction Layer Formerly known as Zen MCP ... Use the 🤖 CLI you love: Claude Code · Gemini CLI · Codex CLI · Qwen Code CLI ·
Starred by 10.6K users
Forked by 899 users
Languages   Python 93.6% | Shell 3.2% | PowerShell 3.1% | Dockerfile 0.1%
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ClaudeLog
claudelog.com › home › mcps & add-ons › zen mcp server
Zen MCP Server | ClaudeLog
Author: BeehiveInnovations | GitHub Repo | 10.4k Stars|889 Forks|Apache 2.0 License|Updated Dec 12, 2025 · Zen MCP Server creates a unified orchestration layer that enables Claude Code to collaborate with multiple AI models simultaneously.
People also ask

What is Zen and how does it enhance Claude?
Zen is a Model Context Protocol (MCP) server that supercharges Claude by orchestrating multiple AI models. It enhances Claude's capabilities for advanced code analysis, problem-solving, and collaborative software development by allowing it to leverage diverse AI perspectives and retain context across complex tasks.
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mcpmarket.com
mcpmarket.com › home › mcp servers › zen
Zen: AI Orchestration for Claude Code Analysis & Dev
Which AI models can Zen integrate with?
Zen seamlessly integrates with a variety of powerful AI models, including Gemini, O3 (OpenAI), and models accessed via OpenRouter. It also supports local AI models like Ollama, vLLM, and LM Studio for enhanced privacy and cost control.
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mcpmarket.com
mcpmarket.com › home › mcp servers › zen
Zen: AI Orchestration for Claude Code Analysis & Dev
Can Zen handle large codebases or extensive documentation?
Yes, Zen extends Claude's context windows by delegating the analysis of large codebases or datasets to high-capacity models (e.g., Gemini 1M tokens, O3 200K tokens). It also features smart file handling to manage token limits efficiently.
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mcpmarket.com
mcpmarket.com › home › mcp servers › zen
Zen: AI Orchestration for Claude Code Analysis & Dev
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MCP Market
mcpmarket.com › home › mcp servers › zen
Zen: AI Orchestration for Claude Code Analysis & Dev
Orchestrates multiple AI models ... software development. ... Zen is a Model Context Protocol (MCP) server that empowers Claude by providing access to a suite of external AI models, transforming it into an ultimate AI development team....
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Medium
medium.com › the-context-layer › claude-code-in-zen-mode-ff64d7f8a919
Claude Code In Zen Mode — Choose Your Own Model With ZEN MCP | by Jannis | The Context Layer | Medium
June 25, 2025 - That’s exactly what Zen MCP Server delivers. This means Claude can break down complex development tasks, assign different parts to the most suitable AI models, and maintain context across the entire workflow.
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ClaudeLog
claudelog.com › addons › zen-mcp-server
Zen MCP Server
Claude Code documentation, tutorials & best practices from real-world usage. Expert insights, optimization techniques, and searchable knowledge base.
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MCP Servers
mcpservers.org › zen mcp
Zen MCP | Awesome MCP Servers
Next: Now run claude from your project folder using the terminal for it to connect to the newly added mcp server. If you were already running a claude code session, please exit and start a new session. Need the exact configuration? Run ./run-server.sh -c to display the platform-specific setup instructions with correct paths. Open Claude Desktop config: Settings → Developer → Edit Config · Copy the configuration shown by ./run-server.sh -c into your claude_desktop_config.json ... "Using zen perform a code review of this code for security issues" → Claude might pick Gemini Pro + codereview
Find elsewhere
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Reddit
reddit.com › r/claudeai › review with zen. give your claude code a friend.
r/ClaudeAI on Reddit: Review with zen. Give your Claude Code a friend.
June 24, 2025 -

This was a game changer for me - let Claude Code review with zen MCP before and after every a meaningful update to the code. Gemini is being the adult in the room, looking over Claude Code's shoulder.

It results with meaningfully better code. It finds bugs (real ones), focusing not only on the code itself but what's around it, how it's being used, etc.

They're just better together, Claude and Gemini (I'm not impressed by zen + o3 abilities - it feels like o3 is trying too hard (to impress?) by recommending over-engineered changes), and it made me think - if LLMs behave in similar ways to our brains, perhaps they are meant to work together on other high-value tasks? I know it's not a new concept but the positive impact is very clear to me now.

Thoughts?

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LobeHub
lobehub.com › mcp › beehiveinnovations-zen-mcp-server
Zen MCP | MCP Servers · LobeHub
1 month ago - Zen MCP is a Model Context Protocol server that orchestrates multiple AI models including Claude, Gemini, O3, and others for enhanced code analysis, problem-solving, and collaborative development.
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GitHub
github.com › 199-mcp › mcp-zen
GitHub - 199-mcp/mcp-zen: Enhanced Zen MCP Server with 'zen' default tool and improvements
{ "mcpServers": { "zen": { "command": "npx", "args": ["zen-mcp-server-199bio"], "env": { "GEMINI_API_KEY": "your_gemini_key_here", "OPENAI_API_KEY": "your_openai_key_here", "OPENROUTER_API_KEY": "your_openrouter_key_here" } } } } That's it! Just restart Claude Desktop and you're ready to go.
Starred by 41 users
Forked by 4 users
Languages   JavaScript
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Zenhub
developers.zenhub.com › mcp › index.html
MCP Server | Zenhub Developers
Zenhub's MCP server lets you query and interact with your Zenhub data through AI clients like Claude Code, Cursor, Windsurf, Gemini CLI, and even Claude Desktop.
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Glama
glama.ai › mcp › servers › zen mcp server
Zen MCP Server by 199-biotechnologies | Glama
Gives Claude access to multiple AI models (Gemini, OpenAI, OpenRouter, Ollama) for enhanced development capabilities including extended reasoning, collaborative development, code review, and advanced debugging.
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Jimmy Song
jimmysong.io › jimmy song's blog › ai resources › zen mcp server
Zen MCP Server - Discover Zen MCP Server, your AI development assistant for enhanced coding …
September 28, 2025 - The server provides a rich set of development tools, including code review, performance optimization, debugging assistance, and refactoring analysis. It supports multi-model collaboration, allowing Claude to maintain control while calling upon ...
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Reddit
reddit.com › r/claudeai › claude code + o3 + gemini pro + flash: all working as one!
r/ClaudeAI on Reddit: Claude Code + O3 + Gemini Pro + Flash: All working as One!
April 28, 2025 -

Meet Zen MCP: One Context, Many Minds.

https://github.com/BeehiveInnovations/zen-mcp-server

This started off as an experiment two days ago with just Claude Code working with Gemini: https://www.reddit.com/r/ClaudeAI/comments/1l73a1x/claude_code_gemini_pro_two_ai_coders_working_as/

But then it exploded into something bigger. You can now use this MCP server to make Claude Code reach out to Gemini Pro / Flash / O3 / O3-Mini and collaboratively solve problems. This has now effectively become Claude Code _for_ Claude Code.

  1. Multi-Model Collaboration with Continuity / Context Awareness

  2. Automatic model selection

  3. Extended context windows beyond Claude's limits

  4. Smart file handling

  5. Effective bypass of MCP's 25K limit but intelligently sharing large prompts as files with the MCP instead

  6. Claude Code can use the same tools with any model and cross-talk and continue with the same thread of communication to find solutions and solve problems.

Features true AI orchestration with conversations that continue across tasks - Give Claude a complex task and let it orchestrate between models automatically. Claude stays in control, performs the actual work, but gets perspectives from the best AI for each subtask. Claude can switch between different tools and models mid-conversation, with context carrying forward seamlessly.

Example Workflow:

  1. Claude uses Gemini Pro to deeply analyze the code in question

  2. Switches to O3 to continue discussion about its findings

  3. Uses Flash to validate formatting suggestions from O3

  4. Performs the actual work after taking in feedback from all three

  5. Returns to Pro for a thorough precommit review

All within a single conversation thread! Gemini Pro in step 5 knows what was recommended by O3 in step 2! Taking that context and review into consideration to aid with its pre-commit review.

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Mcpbro
mcpbro.com › mcp › zen-mcp
Zen MCP | MCPBro - MCP Market - MCP Server Directory
Update claude_desktop_config.json with MCP server configuration (copy instructions from setup). Restart your Claude environment as needed. Interact naturally with Claude, specifying "zen" as your context provider. Example: "Use zen to perform a code review on this function."
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GitHub
github.com › HomecareHomebase › zen-mcp-server
GitHub - HomecareHomebase/zen-mcp-server: The power of Claude Code + [Gemini / OpenAI / Grok / OpenRouter / Ollama / Custom Model / All Of The Above] working as one.
Think of it as Claude Code for Claude Code. This MCP isn't magic. It's just super-glue. Remember: Claude stays in full control — but YOU call the shots. Zen is designed to have Claude engage other models only when needed — and to follow through with meaningful back-and-forth.
Author   HomecareHomebase
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Skypage
skywork.ai › skypage › en › zen-mcp-server-multi-ai-orchestration › 1977579668048908288
Zen MCP Server: The Ultimate Guide to Multi-AI Orchestration
I'm using Claude Code, so I edited its configuration file (e.g., claude_desktop_config.json) to add the Zen server. The configuration tells Claude Code how to launch Zen. { "mcpServers": { "zen": { "command": "sh", "args": [ "-c", "exec $(which uvx || echo uvx) --from git+https://github.com/BeehiveInnovations/zen-mcp-server.git" ], "env": { "PATH": "/usr/local/bin:/usr/bin:/bin:/opt/homebrew/bin:~/.local/bin", "OPENAI_API_KEY": "your_api_key_here", "GEMINI_API_KEY": "your_gemini_key_here" } } } } Example configuration for Claude Code.
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Reddit
reddit.com › r/claudeai › my guy is trying to fix zen-mcp-server with claude code. lmao
r/ClaudeAI on Reddit: My guy is trying to fix zen-mcp-server with Claude Code. LMAO
June 14, 2025 -

So I think all know how useful zen-mcp-server was, but for some reason it just stops sending request back to claude and basically useless.

So I decided to review forks to see if someone tried to fix that and found this guy: https://github.com/FallDownTheSystem/zen-mcp-server

Checked commits and found this gold:

Just wanted to share, that is just LMAO

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GitHub
github.com › BeehiveInnovations › zen-mcp-server › issues › 153
Setup script complains Claude Code not installed when it is. · Issue #153 · BeehiveInnovations/zen-mcp-server
May 21, 2025 - I use Claude Code all day but the ./run-server.sh script doesn't think I have it installed. ... ===== SETUP COMPLETE ===== ========================== ✓ Zen is ready to use! ! Claude CLI not found Would you like to add Zen to Claude Code? (Y/n): Y Please install Claude Code first: Visit: https://docs.anthropic.com/en/docs/claude-code/cli-usage Then run this script again to register MCP.
Published   Jun 27, 2025
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LobeHub
lobehub.com › mcp › zgc-zgc-zen-mcp-sever
Zen MCP: Many Workflows. One Context. | MCP Servers · LobeHub
November 4, 2025 - Next: Now run claude from your project folder using the terminal for it to connect to the newly added mcp server. If you were already running a claude code session, please exit and start a new session. Need the exact configuration? Run ./run-server.sh -c to display the platform-specific setup instructions with correct paths. Open Claude Desktop config: Settings → Developer → Edit Config · Copy the configuration shown by ./run-server.sh -c into your claude_desktop_config.json ... "Using zen perform a code review of this code for security issues" → Claude might pick Gemini Pro + codereview