How to integrate Outline MCP with LangChain

Connect LangChain to Outline MCP. Summarize latest engineering design documents, create onboarding page for new hires, and more using natural language, with authentication handled for you.

Get started for free Get a demo

Outline

Api Key

Outline is a team knowledge base and wiki for creating, organizing, and sharing documentation. It helps teams keep decisions, guides, and project knowledge easy to find.

101 Tools

Managed auth

Connect Outline without auth hassles

We manage OAuth, API keys, token refresh, and scopes — you just build.

Try for free

Introduction

This guide walks you through connecting Outline to LangChain using the Composio tool router. By the end, you'll have a working Outline agent that can summarize latest engineering design documents, create onboarding page for new hires, find outdated api documentation pages through natural language commands.

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

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

Also integrate Outline with

OpenAI Agents SDK Claude Agent SDK Claude Code Claude Cowork Codex OpenClaw Hermes CLI Google ADK Vercel AI SDK Mastra AI LlamaIndex CrewAI

TL;DR

Here's what you'll learn:

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

The Outline MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Outline account. It provides structured and secure access so your agent can perform Outline operations on your behalf.

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:

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

Step-by-step Guide

Step by step10 STEPS

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

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.

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

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

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 Outline functionality through MCP

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 Outline tools
Validating that COMPOSIO_USER_ID is also set before proceeding

Create a Tool Router session

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

const url = session.mcp.url;

What's happening:

We're creating a Tool Router session that gives your agent access to Outline 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 Outline tools as needed

Configure the agent with the MCP URL

const client = new MultiServerMCPClient({
    "outline-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 Outline MCP server via HTTP
The client is configured with a name and the URL from our Tool Router session
getTools() retrieves all available Outline tools that the agent can use
We're creating a LangChain agent using the GPT-5 model

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 Outline 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

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 Outline 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: ['outline']
        }
    );

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

Activate User

Tool to activate a previously suspended user in Outline.

Add Group to Collection

Tool to add a group to a collection in Outline.

Add Document User

Tool to add a user membership to a document.

Add Group to Document

Tool to give all members in a group access to a document.

Add User to Group

Tool to add a user to a group.

Add User to Collection

Tool to add a user to a collection with specified permissions.

Archive Document

Tool to archive a document in Outline.

Create Attachment

Tool to create an attachment in Outline.

Create Collection

Tool to create a new collection in Outline.

Create Comment

Tool to create a comment on an Outline document.

Create Document

Tool to create a new document in Outline.

Create Group

Tool to create a new group in Outline.

Create OAuth Client

Tool to create a new OAuth client in Outline.

Create Share

Tool to create a public share link for an Outline document.

Create Star

Tool to create a star for a document or collection in Outline.

Create Template

Tool to create a new template in Outline.

Create View

Tool to create a view for a document.

Delete Attachment

Tool to delete an attachment from Outline.

Delete Collection

Tool to delete a collection and all of its documents from Outline.

Delete Comment

Tool to delete a comment in Outline.

Delete Document

Tool to delete a document in Outline.

Delete File Operation

Tool to delete a file operation and its associated files from Outline.

Delete Group

Tool to delete a group from Outline.

Delete OAuth Authentication

Tool to delete an OAuth authentication in Outline.

Delete OAuth Client

Tool to delete an OAuth client from Outline.

Delete Star

Tool to delete a star from a document in Outline.

Delete Template

Tool to delete a template in Outline.

Delete User

Tool to delete a user in Outline.

Duplicate Document

Tool to duplicate an Outline document.

Duplicate Template

Tool to duplicate an Outline template.

Empty Documents Trash

Tool to permanently delete all documents in the trash.

Export All Collections

Tool to export all collections and their documents in bulk.

Export Collection

Tool to export a collection in markdown, JSON, or HTML format.

Export Document

Tool to export a document from Outline in Markdown, HTML, or PDF format.

Get Attachment Redirect URL

Tool to retrieve an attachment redirect URL from Outline.

Get authentication config

Tool to retrieve authentication configuration options for an Outline workspace.

Get Collection Info

Tool to retrieve a collection by its unique identifier.

Get Collection Documents

Tool to retrieve a collection's document structure as a tree of navigation nodes.

Get Comment

Tool to retrieve a comment by its ID from Outline.

Get Document Info

Tool to retrieve a document from Outline by its UUID, urlId, or shareId.

Get Document Children Structure

Tool to retrieve a document's child structure.

Get File Operation Info

Tool to retrieve the details and current status of a file operation by its unique identifier.

Get Group Info

Tool to retrieve a group by its unique identifier.

Get OAuth Client Info

Tool to retrieve an OAuth client from Outline by its id or clientId.

Get Revision Info

Tool to retrieve a revision by its ID from Outline.

Get Share Info

Tool to retrieve a share object by its unique identifier or by the associated document ID.

Get Template Info

Tool to retrieve a template by its unique identifier.

Get User Info

Tool to retrieve a user by their unique identifier.

Invite Users

Tool to invite users to the Outline workspace.

List Archived Documents

List all archived documents in the Outline workspace.

List Collection Group Memberships

Tool to list all group memberships for a specific collection in Outline.

List collection memberships

Tool to list all individual user memberships for a collection.

List Collections

Tool to list all collections that the authenticated user has access to.

List Comments

Tool to retrieve all comments with optional filtering by document or collection.

List Data Attributes

Tool to list all data attributes in Outline.

List Deleted Documents

Tool to list all deleted documents in the workspace that the current user has access to.

List Document Group Memberships

Tool to list a document's group memberships.

List document memberships

Tool to list users with direct membership to a document.

List Documents

Tool to list all documents in your Outline workspace.

List Document Users

Tool to list all users with access to a document.

List Draft Documents

Tool to list all draft documents belonging to the current user.

List Events

Tool to list all events from the audit trail.

List File Operations

Tool to list all file operations for the workspace.

List Group Memberships

Tool to list all members of a specific group in Outline.

List Groups

Tool to list all groups in the workspace.

List OAuth Authentications

Tool to list all OAuth authentications for the current user.

List OAuth Clients

Tool to list all OAuth clients accessible to the authenticated user.

List Recently Viewed Documents

Tool to list all recently viewed documents by the current user.

List Revisions

Tool to list all revisions for a specific document.

List Shares

Tool to list all share links in the workspace.

List Stars

Tool to list all starred documents and collections for the authenticated user.

List Templates

Tool to list all templates available to the current user.

List Users

Tool to list all users in the workspace.

List Views

Tool to list all users that have viewed a specific document and the overall view count.

Move Document

Tool to move a document to a new location or collection in Outline.

Redirect File Operation

Tool to retrieve a file from Outline by file operation ID.

Remove Collection Group

Tool to remove a group from a collection, revoking access for all group members.

Remove Collection User

Tool to remove a user from a collection.

Remove Document User

Tool to remove a user membership from a document.

Remove Group from Document

Tool to remove a group from a document, revoking access for all group members.

Remove Group User

Tool to remove a user from a group.

Restore Document

Tool to restore a document in Outline.

Restore Template

Tool to restore a previously deleted template in Outline.

Retrieve Auth Info

Tool to retrieve authentication details for the current API key.

Revoke Share

Tool to revoke a share in Outline, making the share link inactive so it can no longer be used to access the document.

Rotate OAuth Client Secret

Tool to rotate the secret for an OAuth client in Outline.

Search Documents

Tool to search all documents in your Outline workspace using keywords.

Search Document Titles

Tool to search document titles in Outline workspace using keywords.

Suspend User

Tool to suspend a user in Outline.

Create Template from Document

Tool to create a template from an existing Outline document.

Unpublish Document

Tool to unpublish a document in Outline.

Update Collection

Tool to update an existing collection's properties in Outline.

Update Comment

Tool to update a comment in Outline.

Update Document

Tool to update a document in Outline.

Update Group

Tool to update an existing group's name in Outline.

Update OAuth Client

Tool to update an existing OAuth client in Outline.

Update Share

Tool to update a share in Outline.

Update Star

Tool to update a star's position in the Outline sidebar.

Update Template

Tool to update an existing template in Outline.

Update User

Tool to update a user's name, avatar, or language preference in Outline.

Update User Role

Tool to change a user's role in Outline workspace.

FRAMEWORKS

How to build Outline MCP Agent with another framework

OpenAI Agents SDK

Use Outline MCP with OpenAI Agents SDK

Claude Agent SDK

Use Outline MCP with Claude Agent SDK

Claude Code

Use Outline MCP with Claude Code

Claude Cowork

Use Outline MCP with Claude Cowork

Codex

Use Outline MCP with Codex

OpenClaw

Use Outline MCP with OpenClaw

Hermes

Use Outline MCP with Hermes

CLI

Use Outline MCP with CLI

Google ADK

Use Outline MCP with Google ADK

Vercel AI SDK

Use Outline MCP with Vercel AI SDK

Mastra AI

Use Outline MCP with Mastra AI

LlamaIndex

Use Outline MCP with LlamaIndex

CrewAI

Use Outline MCP with CrewAI

MORE TOOLKITS

Explore Other Toolkits

Toolkit marketplace

Google Drive

Oauth2

Google Drive is a cloud storage platform for uploading, sharing, and collaborating on files. It's perfect for keeping your documents accessible and organized across devices.

Google Docs

Oauth2

Google Docs is a cloud-based word processor that enables document creation and real-time collaboration. Its seamless sharing and version history make team editing and content management a breeze.

Google Super

Oauth2Api Key

Google Super is an all-in-one suite combining Gmail, Drive, Calendar, Sheets, Analytics, and more. It gives you a unified platform to manage your digital life, boosting productivity and organization.

Affinda

Api Key

Affinda is an AI-powered document processing platform that automates data extraction from resumes, invoices, and more. It streamlines document-heavy workflows by turning files into structured, actionable data.

FAQ

Frequently asked questions

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

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

Start with Outline.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Outline tool your agent needs.Free to start.

Start building

Customer stories

Teams ship real agents on Composio

GET STARTED FOR FREE BOOK A DEMO

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

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

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

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

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

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

Co-Founder, Ingram Technologies

How to integrate Outline MCP with LangChain

Connect Outline without auth hassles

Introduction

Also integrate Outline with

TL;DR

What is LangChain?

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

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

What is Composio SDK?

How the Composio SDK works

Step-by-step Guide

Prerequisites

Getting API Keys for OpenAI and Composio

Install dependencies

Set up environment variables

Import dependencies

Initialize Composio client

Create a Tool Router session

Configure the agent with the MCP URL

Set up interactive chat interface

Run the application

Complete Code

Conclusion

Supported Tools

How to build Outline MCP Agent with another framework

OpenAI Agents SDK

Claude Agent SDK

Claude Code

Claude Cowork

Codex

OpenClaw

Hermes

CLI

Google ADK

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

Explore Other Toolkits

Google Drive

Google Docs

Google Super

Affinda

Frequently asked questions

What are the differences in Tool Router MCP and Outline MCP?+

Can I use Tool Router MCP with LangChain?+

Can I manage the permissions and scopes for Outline while using Tool Router?+

How safe is my data with Composio Tool Router?+

Start with Outline.It takes 30 seconds.

Teams ship real agents on Composio