SendGrid MCP Server

This MCP Server provides a tool to send emails using the SendGrid API.

Installation and Setup

This server can be used with any DXT-compatible application or configured to run directly in your preferred IDE (Cursor, Cline, etc).

For Claude (as a DXT Extension)

1. Install the Extension:

   • Download the latest sendgrid-mcp-server.dxt file from the GitHub Releases tab.
   • Open Claude for macOS or Windows.
   • Install the extension by opening the downloaded .dxt file.

2. Configure the Extension:

   • After installation, you will be prompted to configure the extension.
   • SendGrid API Key: Enter your SendGrid API key. This is a sensitive value and will be stored securely.
   • From Email: Enter the email address you want to send emails from. This must be a verified sender in your SendGrid account.

For Cline Desktop (using NPX)

You can configure the server to run directly with npx in Cline Desktop's MCP settings. There are two ways to do this:

Option 1: Using the Cline Desktop UI

1. Open Cline Desktop's settings.

2. Navigate to the MCP (Model Context Protocol) section.

3. Click "Add Server" and configure it as follows:

   • Server Name: SendGrid MCP Server (or any name you prefer)
   • Command: npx
   • Arguments: sendgrid-mcp-server
   • Environment Variables:
     • SENDGRID_API_KEY: Your SendGrid API key.
     • FROM_EMAIL: The email address you want to send emails from.

4. Save the settings and restart Cline.

The server will now be managed by Cline and will start automatically.

Option 2: Manual JSON Configuration

Alternatively, you can add the following JSON object to your cline_mcp_settings.json file:

{
  "mcpServers": {
    "sendgrid": {
      "command": "npx",
      "args": [
        "sendgrid-mcp-server"
      ],
      "env": {
        "SENDGRID_API_KEY": "YOUR_API_KEY",
        "FROM_EMAIL": "YOUR_VERIFIED_FROM_ADDRESS"
      },
      "transportType": "stdio"
    }
  }
}

Replace "YOUR_API_KEY" and "YOUR_VERIFIED_FROM_ADDRESS" with your actual credentials.

For Cursor

Add the following to your mcp_servers.json file:

{
"sendgrid": {
  "command": "npx",
  "args": [
    "sendgrid-mcp-server"
  ],
  "env": {
    "SENDGRID_API_KEY": "YOUR_SENDGRID_API_KEY",
    "FROM_EMAIL": "YOUR_FROM_EMAIL"
  }
}}

Replace "YOUR_SENDGRID_API_KEY" and "YOUR_FROM_EMAIL" with your actual credentials.

Usage

The extension provides a single tool: sendEmail.

sendEmail(to: string, subject: string, body: string)

This tool sends an email to the specified recipient.

• to: The recipient's email address.
• subject: The subject of the email.
• body: The plain text body of the email.

Example:

sendEmail(
  to: "recipient@example.com",
  subject: "Hello from DXT!",
  body: "This is a test email sent from the SendGrid DXT extension."
)

Development

Prerequisites

• Node.js >= 16.0.0
• npm

Setup

1. Clone the repository.
2. Install the dependencies:

   npm install

Running the Server

To run the MCP server directly for testing, you can use npm start or npx:

npm start

Or, if you want to run it without cloning the repository:

npx sendgrid-mcp-server

Packaging the Extension

To package the extension into a .dxt file:

1. Install the dxt CLI tool:

   npm install -g @anthropic-ai/dxt

2. Run the pack command:

   dxt pack

This will create a sendgrid-mcp-server.dxt file in the project root.