Modal MCP Server

An MCP server implementation for interacting with Modal volumes and deploying Modal applications from within Cursor.

Installation

1. Clone this repository:

git clone https://github.com/smehmood/modal-mcp-server.git

cd modal-mcp-server

2. Install dependencies using uv:

uv sync

Configuration

To use this MCP server in Cursor, add the following configuration to your ~/.cursor/mcp.json:

{
  "mcpServers": {
    "modal-mcp-server": {
      "command": "uv",
      "args": [
        "--project", "/path/to/modal-mcp-server",
        "run", "/path/to/modal-mcp-server/src/modal_mcp/server.py"
      ]
    }
  }
}

Replace /path/to/modal-mcp-server with the absolute path to your cloned repository.

Requirements

- Python 3.11 or higher
- uv package manager
- Modal CLI configured with valid credentials
- For Modal deploy support:
- Project being deployed must use uv for dependency management
- Modal must be installed in the project's virtual environment

Supported Tools

Modal Volume Operations

1. List Modal Volumes (list_modal_volumes)
- Lists all Modal volumes in your environment
- Returns JSON-formatted volume information
- Parameters: None

2. List Volume Contents (list_modal_volume_contents)
- Lists files and directories in a Modal volume
- Parameters:
- volume_name: Name of the Modal volume
- path: Path within volume (default: "/")

3. Copy Files (copy_modal_volume_files)
- Copies files within a Modal volume
- Parameters:
- volume_name: Name of the Modal volume
- paths: List of paths where last path is destination
- Example: ["source.txt", "dest.txt"] or ["file1.txt", "file2.txt", "dest_dir/"]

4. Remove Files (remove_modal_volume_file)
- Deletes a file or directory from a Modal volume
- Parameters:
- volume_name: Name of the Modal volume
- remote_path: Path to file/directory to delete
- recursive: Boolean flag for recursive deletion (default: false)

5. Upload Files (put_modal_volume_file)
- Uploads a file or directory to a Modal volume
- Parameters:
- volume_name: Name of the Modal volume
- local_path: Path to local file/directory to upload
- remote_path: Path in volume to upload to (default: "/")
- force: Boolean flag to overwrite existing files (default: false)

6. Download Files (get_modal_volume_file)
- Downloads files from a Modal volume
- Parameters:
- volume_name: Name of the Modal volume
- remote_path: Path to file/directory in volume to download
- local_destination: Local path to save downloaded files (default: current directory)
- force: Boolean flag to overwrite existing files (default: false)
- Note: Use "-" as local_destination to write file contents to stdout

Modal Deployment

1. Deploy Modal App (deploy_modal_app)
- Deploys a Modal application
- Parameters:
- absolute_path_to_app: Absolute path to the Modal application file
- Note: The project containing the Modal app must:
- Use uv for dependency management
- Have the modal CLI installed in its virtual environment

Response Format

All tools return responses in a standardized format, with slight variations depending on the operation type:

```python