How to Use the Zulip MCP in LangChain

Q: How do I search Zulip history using LangChain?

You use the zulipgetmessages tool. Just pass an anchor like 'newest' to pull the latest message history from a stream or DM. The agent handles the rest.

Q: Can I get user data for Zulip using LangChain?

Yep. You can list every member in the organization with zulipgetusers. This is raw profile data your chain uses to build relationships or target messages.

Q: How do I send a targeted Zulip message using LangChain?

You use zulipsendmessage. You gotta specify if the target is a 'stream' (a channel) or 'direct' (a DM), and then pass the content. It keeps it simple.

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Connect Zulip MCP to LangChain

Create your Vinkius account to connect Zulip to LangChain and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Zulip with LangChain

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Run complex chat logic in chains

You can build multi-step reasoning where the agent decides which tool to call and in what order. For example, an agent first uses `zulip_get_streams` to list available channels; then, it might use `zulip_get_messages` with a specific anchor to pull recent history. This sequence of calls lets you build complex logic that goes beyond simple single-step actions. The output from one tool becomes the direct input for the next, handling everything from reading user lists via `zulip_get_users` to sending an alert using `zulip_send_message`.

Manage Zulip presence and subscriptions

The MCP Server lets your agent update status directly. You'll use `zulip_set_presence` to change the user's current availability, which is critical for multi-agent coordination. Beyond status, you can manage access points by calling `zulip_subscribe_to_stream`. This ensures your AI client has the necessary permissions before attempting to read data with tools like `zulip_get_messages`.

Gather detailed organizational structure

Need a map of who's in the group? The agent calls `zulip_get_users` to fetch every user name and ID in the organization. This list is useful for building workflows that target specific individuals. It also helps you understand the chat environment by listing all available streams using `zulip_get_streams`, or drilling down into a single topic within a stream with `zulip_get_stream_topics`.

Setup guide

Set up Zulip MCP in LangChain

Prerequisites

Python 3.10+ installed
langchain-mcp-adapters + langgraph packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run pip install langchain-mcp-adapters langgraph langchain-openai. The MCP adapters package converts MCP tools into native LangChain BaseTool objects.
2

Connect via HTTP transport
Use MultiServerMCPClient with "transport": "http" pointing to your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Create a ReAct agent
Pass the discovered tools to create_react_agent() from LangGraph. The agent automatically routes Zulip tool calls through the MCP protocol.
4

Run with any LLM
Swap ChatOpenAI for ChatAnthropic, ChatGoogleGenerativeAI, or any LangChain-compatible model. The MCP tools work identically across all providers.

agent.py

from langchain_mcp_adapters.client import MultiServerMCPClient
from langgraph.prebuilt import create_react_agent
from langchain_openai import ChatOpenAI

async with MultiServerMCPClient({
    "zulip-mcp": {
        "transport": "http",
        "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    }
}) as client:
    tools = client.get_tools()

    agent = create_react_agent(
        ChatOpenAI(model="gpt-4o"),
        tools,
    )
    result = await agent.ainvoke({
        "messages": "List recent Zulip transactions"
    })
    print(result["messages"][-1].content)

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Common questions about Zulip MCP in LangChain

You use the `zulip_get_messages` tool. Just pass an anchor like 'newest' to pull the latest message history from a stream or DM. The agent handles the rest.

Yep. You can list every member in the organization with `zulip_get_users`. This is raw profile data your chain uses to build relationships or target messages.

The MCP Server exposes all tools as callable functions. Your agent decides when and how to call them, chaining the results together for complex actions like reading a stream topic (`zulip_get_stream_topics`) and then reacting to it (`zulip_add_reaction`).

This server touches user profile data, specifically names and IDs retrieved via `zulip_get_users`, as well as message content when calling `zulip_get_messages`.

You use `zulip_send_message`. You gotta specify if the target is a 'stream' (a channel) or 'direct' (a DM), and then pass the content. It keeps it simple.

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