Upload File MCP server

This MCP server enables file uploads by extending the Model Context Protocol. It provides a simple way to upload files to external services with configurable parameters.

Installation

To use the MCP file upload service, you need to add it to your MCP configuration file. No separate installation is required as the configuration will automatically fetch and run the package.

Configuration Setup

Add the following configuration to your MCP configuration file:

{
  "mcpServers": {
    "upload-file": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-upload-file@latest"
      ],
      "env": {
        "UPLOAD_URL": "",        // File upload target URL
        "FILE_KEY": "",          // Form field key for the file
        "FILE_NAME": "",         // Name for the uploaded file
        "EXTRA_FORM": "{\"other_form_key\":\"other_form_value\"}"  // Additional form data (JSON format)
      }
    }
  }
}

Environment Variables

The server's behavior can be customized through the following environment variables:

• UPLOAD_URL (required): The target URL where files will be uploaded
• FILE_KEY (required): The form field key name for the file in the upload request
• FILE_NAME (optional): Specify a custom filename for the uploaded file
• EXTRA_FORM (optional): Additional form data in valid JSON string format

Usage

Basic Usage

To use the file upload service, ensure you've properly configured the required environment variables. At minimum, you must specify:

1. The target upload URL (UPLOAD_URL)
2. The form field key for the file (FILE_KEY)

Adding Additional Form Data

If your upload endpoint requires additional form fields beyond the file itself, use the EXTRA_FORM variable with a JSON string:

{
  "api_key": "your-api-key",
  "category": "documents",
  "public": true
}

Custom Filename

To override the original filename during upload, specify the FILE_NAME variable with your desired filename.

How to add this MCP server to Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > MCP and click "Add new global MCP server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "cursor-rules-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "cursor-rules-mcp"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.