How to integrate Productlane MCP with LangChain

This guide walks you through connecting Productlane to LangChain using the Composio tool router. By the end, you'll have a working Productlane agent that can open productlane widget for user feedback, display specific docs article in widget, register listener for widget submit events through natural language commands. This guide will help you understand how to give your LangChain agent real control over a Productlane account through Composio's Productlane MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Productlane is a customer support and feedback platform built on Linear. It helps companies collect, organize, and act on customer feedback for better product decisions.

39 Tools

Introduction

This guide walks you through connecting Productlane to LangChain using the Composio tool router. By the end, you'll have a working Productlane agent that can open productlane widget for user feedback, display specific docs article in widget, register listener for widget submit events through natural language commands.

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

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

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TL;DR

Here's what you'll learn:
  • Get and set up your OpenAI and Composio API keys
  • Connect your Productlane project to Composio
  • Create a Tool Router MCP session for Productlane
  • Initialize an MCP client and retrieve Productlane tools
  • Build a LangChain agent that can interact with Productlane
  • 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 Productlane MCP server, and what's possible with it?

The Productlane MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Productlane account. It provides structured and secure access to your customer feedback and support workflows, so your agent can programmatically control the Productlane widget, surface documentation, listen for widget events, and manage user interaction—all on your behalf.

  • Dynamic widget control: Let your agent open, close, enable, disable, or toggle the Productlane widget in response to customer or team actions.
  • Contextual docs surfacing: Automatically display specific Productlane documentation articles within the widget to assist users at the right moment.
  • Event-driven automation: Register or remove event listeners so your agent can react to widget events like open, close, submit, or widget load—enabling smart, real-time workflows.
  • Seamless widget experience: Programmatically manage the widget's state across your app to ensure users always get the right support touchpoint.
  • Custom interaction flows: Use the widget's event system to trigger your own logic or follow-ups based on how users interact with Productlane support.

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 Productlane 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 Productlane 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: ['productlane']
    }
);

const url = session.mcp.url;
What's happening:
  • We're creating a Tool Router session that gives your agent access to Productlane 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 Productlane tools as needed
8

Configure the agent with the MCP URL

const client = new MultiServerMCPClient({
    "productlane-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 Productlane MCP server via HTTP
  • The client is configured with a name and the URL from our Tool Router session
  • getTools() retrieves all available Productlane 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 Productlane 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 Productlane 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: ['productlane']
        }
    );

    const url = session.mcp.url;
    
    const client = new MultiServerMCPClient({
        "productlane-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 Productlane 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 Productlane 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 Productlane action and event your agent gets out of the box.

Create Changelog Entry

Tool to create a new changelog entry in Productlane.

Create Company

Tool to create a new company in Productlane.

Create Contact

Tool to create a new contact in your Productlane workspace with optional company linking.

Create Feedback

Tool to create new feedback in Productlane.

Create Insight

Tool to create a new insight/thread in Productlane workspace.

Create Thread

Tool to create a new thread in Productlane.

Create Upvote

Tool to create an upvote for a project or issue.

Delete Company

Tool to delete a company by its unique ID.

Delete Contact

Tool to delete a contact by ID.

Delete Upvote

Tool to delete an upvote by its unique ID.

Enable Productlane Widget

Tool to enable the Productlane widget.

Get Changelog

Tool to retrieve a published changelog by ID from Productlane.

Get Company by ID

Tool to retrieve a company by its unique ID.

Get Contact

Tool to retrieve a contact by ID or email from Productlane.

Get Help Center Article

Tool to retrieve a help center article by its ID.

Get Insight

Tool to retrieve an insight/thread by its ID.

Get Issue by ID

Tool to retrieve a specific issue by its ID from a workspace.

Get Linear Customer Options

Tool to retrieve available Linear customer statuses and tiers for your workspace.

Get Project

Tool to retrieve a project by its ID from a workspace.

Get Workspace

Tool to fetch workspace details by ID.

Invite User to Workspace

Tool to invite a new user to your Productlane workspace.

List Changelogs

Tool to list all published changelogs for a workspace by ID.

List Companies

Tool to list all companies in Productlane.

List contacts

Tool to retrieve all contacts for your workspace.

List Help Center Articles

Tool to list all help center articles for a specific workspace.

List Insights

Tool to list all threads/insights for your workspace with optional filtering.

List Productlane Issues

Tool to retrieve all issues from a Productlane workspace.

List Workspace Members

Tool to retrieve all members of your workspace with their roles and user information.

List Projects

Tool to retrieve all projects within a workspace.

Update Company

Tool to update an existing company record in Productlane by its unique identifier.

Update Contact

Tool to update an existing contact in Productlane.

Update Insight

Tool to update an existing insight (thread) by ID.

Close Productlane Widget

Tool to close the Productlane widget.

Disable Productlane Widget

Tool to disable the Productlane widget across the entire page.

Widget off event

Tool to remove a previously registered widget event listener.

Register Widget Event Listener

Tool to register a listener for Productlane widget events.

Open Productlane Widget

Tool to generate a JavaScript snippet that opens the Productlane widget.

Open Productlane Docs Article in Widget

Tool to open a specific docs article in the Productlane widget.

Toggle Productlane Widget

Tool to toggle the Productlane widget between open and closed states.

FRAMEWORKS

How to build Productlane MCP Agent with another framework

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OpenAI Agents SDK

Use Productlane MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Productlane MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Productlane MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Productlane MCP with Claude Cowork

Codex logo

Codex

Use Productlane MCP with Codex

OpenClaw logo

OpenClaw

Use Productlane MCP with OpenClaw

Hermes logo

Hermes

Use Productlane MCP with Hermes

CLI logo

CLI

Use Productlane MCP with CLI

Google ADK logo

Google ADK

Use Productlane MCP with Google ADK

Vercel AI SDK logo

Vercel AI SDK

Use Productlane MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Productlane MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Productlane MCP with LlamaIndex

CrewAI logo

CrewAI

Use Productlane MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Productlane MCP server, the agents and LLMs can only access a fixed set of Productlane tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Productlane 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 Productlane tools.

Yes, absolutely. You can configure which Productlane 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 Productlane data and credentials are handled as safely as possible.

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Karan skipped his own birthday party to fix our critical issue. It was 10pm and he diverted his Waymo to help us instead. This really sets the bar — it shows the commitment you need when users rely on your software.

Harsha Gaddipati
Harsha Gaddipati
Co-founder, Slashy

A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

Abhi Arya
Abhi Arya
Co-founder, Opennote

We chose Composio over Pipedream because it delivered depth where it mattered — niche tools and tricky edge cases other platforms simply ignored. That gave us confidence to scale without compromising.

Nirman Dave
Nirman Dave
CEO, Zams

As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

Ryan Yu
Ryan Yu
Founder, Extra Thursday

Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

Tomisin Jenrola
Tomisin Jenrola
Founder & CEO, SwarmZero

With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

Jerome Leclanche
Jerome Leclanche
Co-Founder, Ingram Technologies