How to integrate Gitlab MCP with Claude Code

Manage your Gitlab directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns. You can do this in two different ways: Via Composio Connect - Direct and easiest approach Via Composio SDK - Programmatic approach with more control

Gitlab logoGitlab
Oauth2

Gitlab is a web-based DevOps platform for managing source code, issues, and CI/CD pipelines. It streamlines software development with integrated collaboration and automation tools.

58 Tools

Introduction

Manage your Gitlab directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns.

You can do this in two different ways:

  1. Via Composio Connect - Direct and easiest approach
  2. Via Composio SDK - Programmatic approach with more control

Also integrate Gitlab with

Why use Composio?

  • Only one MCP URL to connect multiple apps with Claude Code with zero auth hassles.
  • Programmatic tool calling allows LLMs to write its code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Handling Large tool responses out of LLM context to minimize context rot.
  • Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so LLMs aren't overwhelmed by tools you don't need.

Connecting Gitlab to Claude Code using Composio

1. Add the Composio MCP to Claude

Terminal

2. Start Claude Code

bash
claude

3. Open your MCP list

bash
/mcp

4. Select Composio and click on Authenticate

Select Composio and click Authenticate

5. This will redirect you to the Composio OAuth page. Complete the flow by authorizing Composio and you're all set.

Composio OAuth authorization page
Composio authorization complete
Ask Claude to connect to your account and authenticate via the link

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

The Gitlab MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Gitlab account. It provides structured and secure access to your repositories, projects, and issues, so your agent can perform actions like creating projects, managing issues, handling branches, and automating DevOps workflows on your behalf.

  • Project and group automation: Instantly create new Gitlab projects or organize your workspaces by setting up project groups—all without manual clicks.
  • Issue creation and tracking: Have your agent report bugs, request features, or open new issues in specific projects to keep your team on top of tasks.
  • Branch management: Let your agent create repository branches from any commit or base branch, making it easy to streamline your development process.
  • Project lifecycle management: Archive completed projects or delete unneeded ones, keeping your workspace clean and up to date with minimal effort.
  • Commit and job insights: Retrieve commit references, determine commit sequence in project history, or erase job artifacts and logs for deeper CI/CD control.

Connecting Gitlab via Composio SDK

Composio SDK is the underlying tech that powers Rube. It's a universal gateway that does everything Rube does but with much more programmatic control. You can programmatically generate an MCP URL with the app you need (here Gitlab) for even more tool search precision. It's secure and reliable.

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, make sure you have:
  • Claude Pro, Max, or API billing enabled Anthropic account
  • Composio API Key
  • A Gitlab account
  • Basic knowledge of Python or TypeScript
2

Install Claude Code

bash
# macOS, Linux, WSL
curl -fsSL https://claude.ai/install.sh | bash

# Windows PowerShell
irm https://claude.ai/install.ps1 | iex

# Windows CMD
curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd

To install Claude Code, use one of the following methods based on your operating system:

3

Set up Claude Code

bash
cd your-project-folder
claude

Open a terminal, go to your project folder, and start Claude Code:

  • Claude Code will open in your terminal
  • Follow the prompts to sign in with your Anthropic account
  • Complete the authentication flow
  • Once authenticated, you can start using Claude Code
Claude Code initial setup showing sign-in prompt
Claude Code terminal after successful login
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here

Create a .env file in your project root with the following variables:

  • COMPOSIO_API_KEY authenticates with Composio (get it from Composio dashboard)
  • USER_ID identifies the user for session management (use any unique identifier)
5

Install Composio library

npm install @composio/core dotenv

Install the Composio TypeScript library to create MCP sessions.

  • @composio/core provides the core Composio functionality
  • dotenv loads environment variables from your .env file
6

Generate Composio MCP URL

import 'dotenv/config';
import { Composio } from '@composio/core';

const { COMPOSIO_API_KEY, USER_ID } = process.env;

if (!COMPOSIO_API_KEY || !USER_ID) {
  throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
}

const composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['gitlab'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http gitlab-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);

Create a script to generate a Composio MCP URL for Gitlab. This URL will be used to connect Claude Code to Gitlab.

What's happening

  • We import the Composio client and load environment variables
  • Create a Composio instance with your API key
  • Call create() to create a Tool Router session for Gitlab
  • The returned mcp.url is the MCP server URL that Claude Code will use
  • The script prints this URL so you can copy it
7

Run the script and copy the MCP URL

node --loader ts-node/esm generate_mcp_url.ts
# or if using tsx
tsx generate_mcp_url.ts

Run your TypeScript script to generate the MCP URL.

  • The script connects to Composio and creates a Tool Router session
  • It prints the MCP URL and the exact command you need to run
  • Copy the entire claude mcp add command from the output
8

Add Gitlab MCP to Claude Code

bash
claude mcp add --transport http gitlab-composio "YOUR_MCP_URL_HERE" --headers "X-API-Key:YOUR_COMPOSIO_API_KEY"

# Then restart Claude Code
exit
claude

In your terminal, add the MCP server using the command from the previous step. The command format is:

  • claude mcp add registers a new MCP server with Claude Code
  • --transport http specifies that this is an HTTP-based MCP server
  • The server name (gitlab-composio) is how you'll reference it
  • The URL points to your Composio Tool Router session
  • --headers includes your Composio API key for authentication

After running the command, close the current Claude Code session and start a new one for the changes to take effect.

9

Verify the installation

bash
claude mcp list

Check that your Gitlab MCP server is properly configured.

  • This command lists all MCP servers registered with Claude Code
  • You should see your gitlab-composio entry in the list
  • This confirms that Claude Code can now access Gitlab tools

If everything is wired up, you should see your gitlab-composio entry listed:

Claude Code MCP list showing the toolkit MCP server
10

Authenticate Gitlab

The first time you try to use Gitlab tools, you'll be prompted to authenticate.

  • Claude Code will detect that you need to authenticate with Gitlab
  • It will show you an authentication link
  • Open the link in your browser (or copy/paste it)
  • Complete the Gitlab authorization flow
  • Return to the terminal and start using Gitlab through Claude Code

Once authenticated, you can ask Claude Code to perform Gitlab operations in natural language. For example:

  • "Create new GitLab group for QA team"
  • "Open bug issue in frontend project"
  • "Create branch from latest main commit"

Complete Code

Here's the complete code to get you started with Gitlab and Claude Code:

import 'dotenv/config';
import { Composio } from '@composio/core';

const { COMPOSIO_API_KEY, USER_ID } = process.env;

if (!COMPOSIO_API_KEY || !USER_ID) {
  throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
}

const composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['gitlab'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http gitlab-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);

Conclusion

You've successfully integrated Gitlab with Claude Code using Composio's MCP server. Now you can interact with Gitlab directly from your terminal using natural language commands.

Key features of this setup:

  • Terminal-native experience without switching contexts
  • Natural language commands for Gitlab operations
  • Secure authentication through Composio's managed MCP
  • Tool Router for dynamic tool discovery and execution

Next steps:

  • Try asking Claude Code to perform various Gitlab operations
  • Add more toolkits to your Tool Router session for multi-app workflows
  • Integrate this setup into your development workflow for increased productivity

You can extend this by adding more toolkits, implementing custom workflows, or building automation scripts that leverage Claude Code's capabilities.

TOOLS

Supported Tools

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

Archive Project

Tool to archive a project.

Create GitLab Group

Tool to create a new group in GitLab.

Create Project

Tool to create a new project in GitLab.

Create Project Issue

Tool to create a new issue in a GitLab project.

Create Repository Branch

Tool to create a new branch in a project.

Delete Project

Tool to delete a GitLab project by its ID.

Download Project Avatar

Tool to download a project's avatar image.

Erase Job

Tool to erase the content of a specified job within a project.

Get Commit References

Tool to get all references (branches or tags) a commit is pushed to.

Get Commit Sequence

Tool to get the sequence number of a commit in a project by following parent links from the given commit.

Get Group Details

Tool to retrieve information about a specific group by its ID.

Get Group Member

Tool to retrieve details for a specific group member.

Get Groups

Get Groups

Get Job Details

Tool to retrieve details of a single job by its ID within a specified project.

Get Merge Request Notes

Tool to fetch comments on a merge request.

Get Project

Tool to get a single project by ID or URL-encoded path.

Get Project Languages

Tool to list programming languages used in a project with percentages.

Get Project Member

Tool to retrieve details for a specific project member.

Get Project Member All

Tool to retrieve details for a specific project member (including inherited and invited members).

Get Project Merge Request

Tool to fetch full details for a single merge request when the MR IID is known.

Get Merge Request Commits

Tool to get commits of a merge request.

Get Project Merge Requests

Tool to retrieve a list of merge requests for a specific project.

Get Projects

Tool to list all projects accessible to the authenticated user.

List Merge Request Diffs

Tool to list all diff versions of a merge request.

Get Repository Branch

Tool to retrieve information about a specific branch in a project.

Get Repository Branches

Retrieves a list of repository branches for a project.

Get Single Commit

Tool to get a specific commit identified by the commit hash or name of a branch or tag.

Get Single Pipeline

Tool to retrieve details of a single pipeline by its ID within a specified project.

Get User

Tool to retrieve information about a specific user by their ID.

Get User Preferences

Tool to get the current user's preferences.

Get Users

Tool to retrieve a list of users from GitLab.

Get User Status

Tool to get a user's status by ID.

Get User Status

Tool to get the current user's status.

Get User Support PIN

Tool to get details of the current user's Support PIN.

Import project members

Tool to import members from one project to another.

List All Group Members

Tool to list all members of a group including direct, inherited, and invited members.

List All Project Members

Tool to list all members of a project (direct, inherited, invited).

List Billable Group Members

Tool to list billable members of a top-level group (including its subgroups and projects).

List Group Members

Tool to list direct members of a group.

List Group Projects

Tool to list projects within a GitLab group by group ID or full path.

List Pending Group Members

Tool to list pending members of a group and its subgroups and projects.

List Pipeline Jobs

Tool to retrieve a list of jobs for a specified pipeline within a project.

List Project Groups

Tool to list ancestor groups of a project.

List Project Invited Groups

Tool to list groups invited to a project.

List Project Issues

Tool to list issues for a project with filtering options (state, labels, search, assignee, author, etc.

List Project Pipelines

Tool to retrieve a list of pipelines for a specified project.

List Project Shareable Groups

Tool to list groups that can be shared with a project.

List Project Repository Tags

Tool to retrieve a list of repository tags for a specified project.

List Project Transfer Locations

Tool to list namespaces available for project transfer.

List project users

Tool to list users of a project.

List Repository Commits

Tool to get a list of repository commits in a project.

List User Projects

Tool to list projects owned by a specific user.

Create Support PIN

Tool to create a support PIN for your authenticated user.

Update User Preferences

Tool to update the current user's preferences.

Set User Status

Tool to set the current user's status.

Share Project With Group

Tool to share a project with a group.

Start Housekeeping Task

Tool to start the housekeeping task for a project.

Update Project Issue

Tool to update an existing issue in a GitLab project (title, description, labels, assignees, state, etc.

FAQ

Frequently asked questions

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

Yes, you can. Claude Code 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 Gitlab tools.

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

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