GitLab MR MCP

🚀 GitLab MR MCP

A Model Context Protocol (MCP) server for interacting with GitLab merge requests and issues.

📌 Overview

This project implements a server using the Model Context Protocol (MCP) that allows AI agents to interact with GitLab repositories. It provides tools for:

• Listing available GitLab projects

• Fetching merge request details and comments

• Getting merge request diffs

• Adding comments to merge requests

• Adding line-specific comments to code in merge request diffs

• Fetching issue details

• Setting merge request title and description

🛠️ Available Tools

get_projects Gets a list of GitLab projects accessible with your token.

list_open_merge_requests Lists all open merge requests in the specified project.

get_merge_request_details Gets detailed information about a specific merge request.

get_merge_request_comments Gets comments from a specific merge request, including discussion notes and diff notes.

add_merge_request_comment Adds a general comment to a merge request.

add_merge_request_diff_comment Adds a comment to a specific line in a file within a merge request.

get_merge_request_diff Gets the diff for a merge request.

get_issue_details Gets detailed information about a specific issue.

set_merge_request_title Set the title of a merge request

set_merge_request_description Set the description of a merge request

🏗️ Development

🔍 Running Inspector

Set up environment variables:

export MR_MCP_GITLAB_TOKEN=your_gitlab_token
export MR_MCP_GITLAB_HOST=your_gitlab_host

# Optional env vars to filter the projects the `get_projects` tool has access to:
# https://docs.gitlab.com/api/access_requests/#valid-access-levels
export MR_MCP_MIN_ACCESS_LEVEL=min_access_level
# Search term that should match the project path or name 
export MR_MCP_PROJECT_SEARCH_TERM=term 

For use with MCP clients, you can run:

npx -y @modelcontextprotocol/inspector npm start

📜 License

MIT

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

📦 Installation

⚡ Using Smithery

To install GitLab MR MCP for Claude Desktop automatically via Smithery:

npx -y @smithery/cli@latest install @kopfrechner/gitlab-mr-mcp --client claude --config '"{\"gitlabMrMcpToken\":\"YOUR_GITLAB_TOKEN\", \"gitlabMrMcpHost\": \"YOUR_GITLAB_HOST\"}"'

🛠️ Manual Installation

🔧 Prerequisites

• Node.js

• GitLab access token with API access

• GitLab project ID(s)

📖 Setup

• Clone this repository

• Install dependencies:

npm install

• Add the following to your MCP client configuration:

{
 "mcpServers": {
 "gitlab-mr-mcp": {
 "command": "node",
 "args": ["/path/to/gitlab-mr-mcp/index.js"],
 "env": {
 "MR_MCP_GITLAB_TOKEN": "your_gitlab_token",
 "MR_MCP_GITLAB_HOST": "your_gitlab_host"
 }
 }
 }
}

🛠️ Troubleshooting

If you encounter permissions issues (403 Forbidden), check:

• Your GitLab token has the proper scopes (api, read_api)

• The token user has proper access to the projects

• The project IDs are correct