How to integrate Botstar MCP with LangChain

This guide walks you through connecting Botstar to LangChain using the Composio tool router. By the end, you'll have a working Botstar agent that can open live chat widget for new visitor, update user profile in current chat session, retrieve chatbot application id for setup through natural language commands. This guide will help you understand how to give your LangChain agent real control over a Botstar account through Composio's Botstar MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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BotStar is a comprehensive chatbot platform for designing, developing, and training chatbots visually on Messenger and websites. It helps businesses automate conversations and customer interactions without coding.

31 Tools

Introduction

This guide walks you through connecting Botstar to LangChain using the Composio tool router. By the end, you'll have a working Botstar agent that can open live chat widget for new visitor, update user profile in current chat session, retrieve chatbot application id for setup through natural language commands.

This guide will help you understand how to give your LangChain agent real control over a Botstar account through Composio's Botstar MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

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OpenAI Agents SDKClaude Agent SDKClaude CodeClaude CoworkCodexOpenClawHermesCLIGoogle ADKVercel AI SDKMastra AILlamaIndexCrewAI

TL;DR

Here's what you'll learn:
  • Get and set up your OpenAI and Composio API keys
  • Connect your Botstar project to Composio
  • Create a Tool Router MCP session for Botstar
  • Initialize an MCP client and retrieve Botstar tools
  • Build a LangChain agent that can interact with Botstar
  • Set up an interactive chat interface for testing

What is LangChain?

LangChain is a framework for developing applications powered by language models. It provides tools and abstractions for building agents that can reason, use tools, and maintain conversation context.

Key features include:

  • Agent Framework: Build agents that can use tools and make decisions
  • MCP Integration: Connect to external services through Model Context Protocol adapters
  • Memory Management: Maintain conversation history across interactions
  • Multi-Provider Support: Works with OpenAI, Anthropic, and other LLM providers

What is the Botstar MCP server, and what's possible with it?

The Botstar MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Botstar account. It provides structured and secure access to your chatbot operations, so your agent can perform actions like managing live chat sessions, updating user details, retrieving app parameters, and sending data between webviews and your bot—all on your behalf.

  • Live chat session control: Programmatically open, close, or reinitialize the Botstar live chat widget to manage user interactions in real time.
  • Automated user profile updates: Let your agent update user details and profile attributes during an active chatbot conversation for a more personalized experience.
  • Webview data exchange: Seamlessly send responses from webviews back to the chatbot or retrieve parameters passed from the bot to your webview for dynamic content handling.
  • Custom callback registration: Set up onOpen and onClose event handlers so your agent can trigger actions whenever users interact with the chat window.
  • Application ID and configuration retrieval: Fetch essential Botstar application IDs and parameters for smooth widget initialization and advanced bot customization.

What is the Composio tool router, and how does it fit here?

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Step by step10 STEPS
1

Prerequisites

Before starting this tutorial, make sure you have:
  • Python 3.10 or higher installed on your system
  • A Composio account with an API key
  • An OpenAI API key
  • Basic familiarity with Python and async programming
2

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard and create an API key. You'll need credits to use the models, or you can connect to another model provider.
  • Keep the API key safe.
Composio API Key
  • Log in to the Composio dashboard.
  • Navigate to your API settings and generate a new API key.
  • Store this key securely as you'll need it for authentication.
3

Install dependencies

npm install @composio/langchain @langchain/core @langchain/openai @langchain/mcp-adapters dotenv

Install the required packages for LangChain with MCP support.

What's happening:

  • @composio/langchain provides Composio integration for LangChain
  • @langchain/mcp-adapters enables MCP client connections
  • @langchain/core is the core agent framework
  • dotenv/config loads environment variables
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
COMPOSIO_USER_ID=your_composio_user_id_here
OPENAI_API_KEY=your_openai_api_key_here

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates your requests to Composio's API
  • COMPOSIO_USER_ID identifies the user for session management
  • OPENAI_API_KEY enables access to OpenAI's language models
5

Import dependencies

import { Composio } from '@composio/core';
import { LangchainProvider } from '@composio/langchain';
import { MultiServerMCPClient } from "@langchain/mcp-adapters";
import { createAgent } from "langchain";
import * as readline from 'readline';
import 'dotenv/config';

dotenv.config();
What's happening:
  • We're importing LangChain's MCP adapter and Composio SDK
  • The dotenv/config import loads environment variables from your .env file
  • This setup prepares the foundation for connecting LangChain with Botstar functionality through MCP
6

Initialize Composio client

const composioApiKey = process.env.COMPOSIO_API_KEY;
const userId = process.env.COMPOSIO_USER_ID;

if (!composioApiKey) throw new Error('COMPOSIO_API_KEY is not set');
if (!userId) throw new Error('COMPOSIO_USER_ID is not set');

async function main() {
    const composio = new Composio({
        apiKey: composioApiKey as string,
        provider: new LangchainProvider()
    });
What's happening:
  • We're loading the COMPOSIO_API_KEY from environment variables and validating it exists
  • Creating a Composio instance that will manage our connection to Botstar tools
  • Validating that COMPOSIO_USER_ID is also set before proceeding
7

Create a Tool Router session

const session = await composio.create(
    userId as string,
    {
        toolkits: ['botstar']
    }
);

const url = session.mcp.url;
What's happening:
  • We're creating a Tool Router session that gives your agent access to Botstar tools
  • The create method takes the user ID and specifies which toolkits should be available
  • The returned session.mcp.url is the MCP server URL that your agent will use
  • This approach allows the agent to dynamically load and use Botstar tools as needed
8

Configure the agent with the MCP URL

const client = new MultiServerMCPClient({
    "botstar-agent": {
        transport: "http",
        url: url,
        headers: {
            "x-api-key": process.env.COMPOSIO_API_KEY
        }
    }
});

const tools = await client.getTools();

const agent = createAgent({ model: "gpt-5", tools });
What's happening:
  • We're creating a MultiServerMCPClient that connects to our Botstar MCP server via HTTP
  • The client is configured with a name and the URL from our Tool Router session
  • getTools() retrieves all available Botstar tools that the agent can use
  • We're creating a LangChain agent using the GPT-5 model
9

Set up interactive chat interface

let conversationHistory: any[] = [];

console.log("Chat started! Type 'exit' or 'quit' to end the conversation.\n");
console.log("Ask any Botstar related question or task to the agent.\n");

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
});

rl.prompt();

rl.on('line', async (userInput: string) => {
    const trimmedInput = userInput.trim();

    if (['exit', 'quit', 'bye'].includes(trimmedInput.toLowerCase())) {
        console.log("\nGoodbye!");
        rl.close();
        process.exit(0);
    }

    if (!trimmedInput) {
        rl.prompt();
        return;
    }

    conversationHistory.push({ role: "user", content: trimmedInput });
    console.log("\nAgent is thinking...\n");

    const response = await agent.invoke({ messages: conversationHistory });
    conversationHistory = response.messages;

    const finalResponse = response.messages[response.messages.length - 1]?.content;
    console.log(`Agent: ${finalResponse}\n`);
        
        rl.prompt();
    });

    rl.on('close', () => {
        console.log('\n👋 Session ended.');
        process.exit(0);
    });
What's happening:
  • We initialize an empty conversationHistory list to maintain context across interactions
  • A readline interface is used to continuously accept user input from the command line
  • When a user types a message, it's added to the conversation history and sent to the agent
  • The agent processes the request using the invoke() method with the full conversation history
  • Users can type 'exit', 'quit', or 'bye' to end the chat session gracefully
10

Run the application

main().catch((err) => {
    console.error('Fatal error:', err);
    process.exit(1);
});
What's happening:
  • We call the main() function to start the application

Complete Code

Here's the complete code to get you started with Botstar and LangChain:

import { Composio } from '@composio/core';
import { LangchainProvider } from '@composio/langchain';
import { MultiServerMCPClient } from "@langchain/mcp-adapters";  
import { createAgent } from "langchain";
import * as readline from 'readline';
import 'dotenv/config';

const composioApiKey = process.env.COMPOSIO_API_KEY;
const userId = process.env.COMPOSIO_USER_ID;

if (!composioApiKey) throw new Error('COMPOSIO_API_KEY is not set');
if (!userId) throw new Error('COMPOSIO_USER_ID is not set');

async function main() {
    const composio = new Composio({
        apiKey: composioApiKey as string,
        provider: new LangchainProvider()
    });

    const session = await composio.create(
        userId as string,
        {
            toolkits: ['botstar']
        }
    );

    const url = session.mcp.url;
    
    const client = new MultiServerMCPClient({
        "botstar-agent": {
            transport: "http",
            url: url,
            headers: {
                "x-api-key": process.env.COMPOSIO_API_KEY
            }
        }
    });
    
    const tools = await client.getTools();
  
    const agent = createAgent({ model: "gpt-5", tools });
    
    let conversationHistory: any[] = [];
    
    console.log("Chat started! Type 'exit' or 'quit' to end the conversation.\n");
    console.log("Ask any Botstar related question or task to the agent.\n");
    
    const rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout,
        prompt: 'You: '
    });

    rl.prompt();

    rl.on('line', async (userInput: string) => {
        const trimmedInput = userInput.trim();
        
        if (['exit', 'quit', 'bye'].includes(trimmedInput.toLowerCase())) {
            console.log("\nGoodbye!");
            rl.close();
            process.exit(0);
        }
        
        if (!trimmedInput) {
            rl.prompt();
            return;
        }
        
        conversationHistory.push({ role: "user", content: trimmedInput });
        console.log("\nAgent is thinking...\n");
        
        const response = await agent.invoke({ messages: conversationHistory });
        conversationHistory = response.messages;
        
        const finalResponse = response.messages[response.messages.length - 1]?.content;
        console.log(`Agent: ${finalResponse}\n`);
        
        rl.prompt();
    });

    rl.on('close', () => {
        console.log('\nSession ended.');
        process.exit(0);
    });
}

main().catch((err) => {
    console.error('Fatal error:', err);
    process.exit(1);
});

Conclusion

You've successfully built a LangChain agent that can interact with Botstar through Composio's Tool Router.

Key features of this implementation:

  • Dynamic tool loading through Composio's Tool Router
  • Conversation history maintenance for context-aware responses
  • Async Python provides clean, efficient execution of agent workflows
You can extend this further by adding error handling, implementing specific business logic, or integrating additional Composio toolkits to create multi-app workflows.
TOOLS

Supported Tools

Every Botstar action and event your agent gets out of the box.

Create Bot

Tool to create a new bot in BotStar.

Create Bot Attribute

Tool to create a new bot attribute in BotStar.

Create CMS Entity

Tool to create a CMS entity in BotStar with a name and optional fields.

Create Entity Fields

Tool to create entity field(s) in BotStar CMS.

Create Entity Item

Tool to create a new entity item in BotStar CMS.

Create User Attributes

Tool to create custom user attributes in BotStar.

Delete Bot Attribute

Tool to delete a bot attribute by ID.

Delete CMS Entity

Tool to delete a CMS entity by ID.

Delete Entity Fields

Tool to delete entity field(s) from a CMS entity.

Delete Entity Item

Tool to delete an entity item from a CMS entity.

Get Bot

Tool to get your bot by bot ID.

Get BotStar Application IDs

Tool to retrieve the BotStar application ID (`appId`).

Get CMS Entity

Tool to get a specific CMS entity by ID.

Get Entity Item

Tool to retrieve a specific item from a CMS entity with all field values.

List Bot Attributes

Tool to get all bot attributes from BotStar.

List Bots

Tool to get your list of bots.

List CMS Entities

Tool to retrieve all CMS entities for a bot.

List Entity Items

Tool to retrieve all entity items with pagination support.

Livechat boot

Tool to reinitialize the live chat widget with provided data.

Close BotStar Livechat Widget

Tool to hide the live chat window.

BotStar LiveChat onClose Callback

Tool to register a callback when the chat window is closed.

Livechat on open

Tool to register a callback when the chat window is opened.

Livechat open

Tool to show the live chat window.

Livechat update

Tool to update user details on the current live chat session.

Publish Bot to Live

Tool to publish a bot to live.

Update Bot Attribute

Tool to update a bot attribute in BotStar.

Update CMS Entity

Tool to update a CMS entity in BotStar.

Update Entity Fields

Tool to update entity field(s) in BotStar CMS.

Update Entity Item

Tool to update a CMS entity item in BotStar.

Get BotStar Webview Parameter

Tool to retrieve a parameter value passed from the BotStar chatbot to the webview.

Webview send response

Tool to send data from the webview back to the BotStar chatbot.

FRAMEWORKS

How to build Botstar MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Botstar MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Botstar MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Botstar MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Botstar MCP with Claude Cowork

Codex logo

Codex

Use Botstar MCP with Codex

OpenClaw logo

OpenClaw

Use Botstar MCP with OpenClaw

Hermes logo

Hermes

Use Botstar MCP with Hermes

CLI logo

CLI

Use Botstar MCP with CLI

Google ADK logo

Google ADK

Use Botstar MCP with Google ADK

Vercel AI SDK logo

Vercel AI SDK

Use Botstar MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Botstar MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Botstar MCP with LlamaIndex

CrewAI logo

CrewAI

Use Botstar MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Botstar MCP server, the agents and LLMs can only access a fixed set of Botstar tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Botstar and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. LangChain fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Botstar tools.

Yes, absolutely. You can configure which Botstar scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Botstar data and credentials are handled as safely as possible.

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