🚀 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

📦 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

1. Clone this repository

2. Install dependencies:

npm install

3. 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"
      }
    }
  }
}

🛠️ 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

🛠️ Troubleshooting

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

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

2. The token user has proper access to the projects

3. The project IDs are correct

📜 License

MIT

🤝 Contributing

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