Zulipchat MCP

🚀 ZulipChat MCP Server

The Model Context Protocol server for Zulip Chat. Connects Claude Code, Gemini CLI, Codex, Cursor, Windsurf, VS Code Copilot, and other MCP clients to Zulip.

🚀 Quick Start

uvx zulipchat-mcp --zulip-config-file ~/.zuliprc

That's it. Your AI assistant can now read and write Zulip messages.

Need a zuliprc? Zulip Settings > Personal > Account & privacy > API key — download the file, save it as ~/.zuliprc.

Interactive onboarding:

uvx zulipchat-mcp-setup

✨ Features

ZulipChat MCP bridges any MCP-compatible AI assistant (Claude Code, Gemini CLI, Cursor, Windsurf, etc.) to your Zulip workspace. The assistant can:

• Send and read messages — stream messages, DMs, replies, reactions
• Search conversation history — full-text search with filters for sender, stream, time range
• Resolve people by name — "message Jaime" just works, no hunting for formal emails
• Switch identities — post as yourself or as a bot, in the same session
• Monitor activity — search recent messages, get stream info, check who's online

📦 Installation

Full per-client setup guide: docs/integrations/README.md

Claude Code

claude mcp add zulipchat -- uvx zulipchat-mcp --zulip-config-file ~/.zuliprc

With dual identity (you + a bot):

claude mcp add zulipchat -- uvx zulipchat-mcp \
  --zulip-config-file ~/.zuliprc \
  --zulip-bot-config-file ~/.zuliprc-bot

Gemini CLI

Add to ~/.gemini/settings.json under mcpServers:

{
  "zulipchat": {
    "command": "uvx",
    "args": ["zulipchat-mcp", "--zulip-config-file", "/path/to/.zuliprc"]
  }
}

Claude Desktop / Cursor / Any MCP Client

Add to your MCP configuration:

{
  "mcpServers": {
    "zulipchat": {
      "command": "uvx",
      "args": ["zulipchat-mcp", "--zulip-config-file", "/path/to/.zuliprc"]
    }
  }
}

Configuration Options

More clients

Dedicated setup pages:

• Gemini CLI
• Codex
• OpenCode
• VS Code + GitHub Copilot
• Cursor
• Windsurf
• Antigravity
• Generic MCP

💻 Usage Examples

Basic Usage

"Catch me up on what happened in #engineering today"

→ Assistant calls `search_messages` with stream + time filter, summarizes the thread.

"Tell the team we're deploying at 3pm"

→ Assistant calls `send_message` to #engineering with the announcement.

"Who sent that message about the API migration?"

→ Assistant calls `search_messages` with keywords, returns sender and context.

"React with :thumbs_up: to Sarah's last message"

→ Assistant calls `resolve_user` ("Sarah"), `search_messages` (sender), then `add_reaction`.

"DM Jaime that the PR is ready"

→ Assistant calls `teleport_chat` with fuzzy name resolution — no email needed.

🔧 Technical Details

Two-Tier Tool Architecture

v0.6.0 introduced a deliberate split: 19 core tools by default, ~55 tools when you need more.

Core Mode (default)

The 19 tools that cover 95% of daily use:

Why 19 instead of 55+? Fewer tools means faster tool selection, lower token overhead, and less confusion for the AI. Most tasks — sending messages, searching, reacting — only need the core set.

Extended Mode

Need scheduled messages, event queues, file uploads, analytics, or advanced search?

uvx zulipchat-mcp --zulip-config-file ~/.zuliprc --extended-tools

Or via environment variable:

ZULIPCHAT_EXTENDED_TOOLS=1 uvx zulipchat-mcp --zulip-config-file ~/.zuliprc

Extended mode adds: toggle_reaction, cross_post_message, advanced_search, construct_narrow, get_scheduled_messages, manage_scheduled_message, register_events, get_events, listen_events, upload_file, manage_files, get_daily_summary, manage_user_mute, get_user, get_presence, get_user_groups, and more.

Architecture

src/zulipchat_mcp/
├── core/           # Client wrapper, identity, caching, security
├── tools/          # MCP tool implementations (two-tier registration)
├── services/       # Background listener, AFK watcher
├── utils/          # Logging, DuckDB persistence, metrics
└── config.py       # config loading (zuliprc + environment fallback)

Built on FastMCP with async-first design, DuckDB for agent state persistence, and smart user/stream caching for fast fuzzy resolution.

📚 Documentation

Dual Identity

Configure both a user and a bot zuliprc to let your assistant switch between identities mid-session:

uvx zulipchat-mcp \
  --zulip-config-file ~/.zuliprc \
  --zulip-bot-config-file ~/.zuliprc-bot

The assistant posts as you by default. Call switch_identity to post as the bot — useful for automated notifications, agent-to-agent communication, or keeping human vs. bot messages distinct.

Development

git clone https://github.com/akougkas/zulipchat-mcp.git
cd zulipchat-mcp
uv sync
uv run zulipchat-mcp --zulip-config-file ~/.zuliprc

Run checks:

uv run pytest -q              # 566 tests, 60% coverage gate
uv run ruff check .           # Linting
uv run mypy src               # Type checking

See CONTRIBUTING.md for the full guide, and CLAUDE.md / AGENTS.md for AI agent instructions.

Privacy

• No data collection — nothing leaves your machine except Zulip API calls
• No telemetry — zero analytics, tracking, or usage reporting
• Local execution — all processing happens on your hardware
• Credentials stay local — API keys are never logged or transmitted beyond your Zulip server

Full policy: PRIVACY.md

📄 License

MIT — See LICENSE

📎 Links

• Documentation Index
• Support
• Security Policy
• Zulip API Documentation
• Model Context Protocol
• Report Issues
• Discussions