GitLab MCP Server

GitLab MCP Server

Connect your AI assistant to GitLab. Ask questions like "List open merge requests", "Show me reviews for MR #123", "Get commit discussions for MR #456", or "Find merge requests for the feature branch" directly in your chat.

Table of Contents

• Quick Setup
• What You Can Do
• Configuration Options
• Troubleshooting
• Tool Reference
• Development
• Security Notes
• Support

Quick Setup

1. Install the server:
   git clone https://github.com/amirsina-mandegari/gitlab-mcp-server.git cd gitlab-mcp-server python -m venv .venv && source .venv/bin/activate pip install -r requirements.txt chmod +x run-mcp.sh
2. Get your GitLab token:
   • Go to GitLab → Settings → Access Tokens
   • Create token with read_api scope
   • Copy the token
3. Configure your project: In your project directory, create gitlab-mcp.env:
   GITLAB_PROJECT_ID=12345 GITLAB_ACCESS_TOKEN=glpat-xxxxxxxxxxxxxxxxxxxx GITLAB_URL=https://gitlab.com
4. Connect to Cursor: Create .cursor/mcp.json in your project:
   { "mcpServers": { "gitlab-mcp": { "command": "/path/to/gitlab-mcp-server/run-mcp.sh", "cwd": "/path/to/your-project" } } }
5. Restart Cursor and start asking GitLab questions!

What You Can Do

Once connected, try these commands in your chat:

• "List open merge requests"
• "Show me details for merge request 456"
• "Get reviews and discussions for MR #123"
• "Show me commit discussions for MR #456"
• "Get all comments on commits in merge request #789"
• "Find merge requests for the feature/auth-improvements branch"
• "Show me closed merge requests targeting main"
• "Reply to discussion abc123 in MR #456 with 'Thanks for the feedback!'"
• "Create a new review comment in MR #789 asking about the error handling"
• "Resolve discussion def456 in MR #123"

Working with Review Comments

The enhanced review tools allow you to interact with merge request discussions:

1. First, get the reviews to see discussion IDs:
   "Show me reviews for MR #123"
2. Reply to specific discussions using the discussion ID:
   "Reply to discussion abc123 in MR #456 with 'I'll fix this in the next commit'"
3. Create new discussion threads to start conversations:
   "Create a review comment in MR #789 asking 'Could you add error handling here?'"
4. Resolve discussions when issues are addressed:
   "Resolve discussion def456 in MR #123"

Note: The get_merge_request_reviews tool now displays discussion IDs and note IDs in the output, making it easy to reference specific discussions when replying or resolving.

Working with Commit Discussions

The get_commit_discussions tool provides comprehensive insights into discussions and comments on individual commits within a merge request:

1. View all commit discussions for a merge request:
   "Show me commit discussions for MR #123"
2. Get detailed commit conversation history:
   "Get all comments on commits in merge request #456"

This tool is particularly useful for:

• Code Review Tracking: See all feedback on specific commits
• Discussion History: Understand the evolution of code discussions
• Commit-Level Context: View comments tied to specific code changes
• Review Progress: Monitor which commits have been discussed

Technical Implementation:

• Uses /projects/:project_id/merge_requests/:merge_request_iid/commits to get all commits with proper pagination
• Fetches ALL merge request discussions using /projects/:project_id/merge_requests/:merge_request_iid/discussions with pagination support
• Filters discussions by commit SHA using position data to show commit-specific conversations
• Handles both individual comments and discussion threads correctly

The output includes:

• Summary of total commits and discussion counts
• Individual commit details (SHA, title, author, date)
• All discussions and comments for each commit with file positions
• Complete conversation threads with replies
• File positions for diff-related comments
• Thread conversations with replies

Configuration Options

Project-Level (Recommended)

Each project gets its own gitlab-mcp.env file with its own GitLab configuration. Keep tokens out of version control.

Global Configuration

Set environment variables system-wide instead of per-project:

Find Your Project ID

• Go to your GitLab project → Settings → General → Project ID
• Or check the URL: https://gitlab.com/username/project (use the numeric ID)

Troubleshooting

Authentication Error: Verify your token has read_api permissions and is not expired.

Project Not Found: Double-check your project ID is correct (it's a number, not the project name).

Connection Issues: Make sure your GitLab URL is accessible and correct.

Script Not Found: Ensure the path in your MCP config points to the actual server location and the script is executable.

Tool Reference

Development

Project Structure

Adding Tools

1. Create new file in tools/ directory
2. Add import and export to tools/__init__.py
3. Add to list_tools() in main.py
4. Add handler to call_tool() in main.py

Testing

Security Notes

• Add gitlab-mcp.env to your .gitignore
• Never commit access tokens
• Use project-specific tokens with minimal permissions
• Rotate tokens regularly

Support

• Check GitLab API documentation
• Open issues at github.com/amirsina-mandegari/gitlab-mcp-server

License

MIT License - see LICENSE file for details.