GitLab MCP Code Review

What it does

This MCP server integrates AI assistants with GitLab, enabling them to perform comprehensive code reviews directly on merge requests. It allows an AI to analyze changes, understand the context of a PR, and provide actionable feedback within the GitLab ecosystem.

Tools

• fetch_merge_request: Retrieves full details of a merge request, including diffs and comments.
• compare_versions: Compares different branches, tags, or specific commits.
• add_merge_request_comment: Posts comments directly to a merge request.
• approve_merge_request: Marks a merge request as approved.
• unapprove_merge_request: Removes an approval from a merge request.
• get_project_merge_requests: Lists all active merge requests for a project.
• fetch_code_review_rules: Retrieves team-specific review guidelines via SSH.

Installation

Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "gitlab-mcp-code-review": {
      "command": "uv",
      "args": ["--directory", "/path/to/gitlab-mcp-code-review", "run", "server.py"],
      "env": {
        "GITLAB_HOST": "gitlab.com",
        "GITLAB_TOKEN": "your-access-token"
      }
    }
  }
}

Supported hosts

• Claude Desktop
• Cursor