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Sidemail MCP Server

@sidemail

Repository

Basic information

Category

Other

Transports

stdio

Author

sidemail

Submitted by

Kristyna Vrbova

About Sidemail MCP Server

Sidemail.io's official MCP Server. Provides Model Context Protocol (MCP) integration for Sidemail.io, enabling programmatic access to Sidemail's transactional emails, contacts, domains, and Messenger features for product updates and newsletters via MCP agent mode (in VS Code, Cla

#email#email-api#transactional-emails

Sidemail MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "sidemail": {
      "command": "npx",
      "args": [
        "-y",
        "@sidemail/mcp"
      ],
      "env": {
        "SIDEMAIL_API_KEY": "your-key"
      }
    }
  }
}

Sidemail MCP Server tools

19

List all sending domains (Sidemail API)

Create a new sending domain (Sidemail API)

Delete a sending domain (Sidemail API)

List Messenger drafts (Sidemail Messenger API)

Get a Messenger draft by ID (Sidemail Messenger API)

Create a Messenger draft (Sidemail Messenger API). Messenger is a tool for sending newsletters / broadcasts to contacts inside Sidemail.

Update a Messenger draft (Sidemail Messenger API)

Delete a Messenger draft (Sidemail Messenger API)

List all contact groups (Sidemail API)

List all contact groups (Sidemail API)

Update a Group (Sidemail Messenger API)

Create or update a contact (Sidemail API). It's partial update, so you can provide only the fields you want to change. If the contact does not exist, it will be created.

Query contacts with advanced filtering, searching, and pagination (Sidemail API). If the query parameter is empty or not provided, it lists all contacts. The contact data are returned sorted by creation date, with the most recent contact appearing first.

Find a contact by email address (Sidemail API)

Delete a contact by email address (Sidemail API)

Send a transactional email (Sidemail API). This tools can only be used for sending transactional emails, not marketing emails (for that, use the Messenger tool).

Query emails with filtering and pagination (Sidemail API). If the query parameter is empty or not provided, it lists all emails. The email data are returned sorted by creation date, with the most recent emails appearing first.

Retrieve an email by its ID (Sidemail API)

Delete a scheduled email by ID (Sidemail API). Only emails not yet sent can be deleted.

Overview

What is Sidemail?

The Sidemail MCP Server provides Model Context Protocol integration for Sidemail.io, enabling programmatic access to transactional email, contacts, sending domains, and Messenger features for product updates and newsletters through MCP agents in VS Code, Claude, Cursor, and other MCP clients.

How to use Sidemail?

Install and configure the server using npx -y @sidemail/mcp with your Sidemail API Key set as the environment variable SIDEMAIL_API_KEY. Configuration files vary by client: edit claude_desktop_config.json for Claude Desktop, use VS Code’s MCP add-server workflow or manual mcp.json editing, or add to ~/.cursor/mcp.json for Cursor. Alternatively, run npx @sidemail/mcp directly on the command line.

Key features of Sidemail

  • Manage sending domains (list, create, delete)
  • Send test transactional emails
  • Manage contacts and contact groups
  • Create, update, and delete Messenger drafts
  • Query sent emails and contacts

Use cases of Sidemail

  • Programmatically add and verify sending domains
  • Test transactional email delivery during development
  • Bulk update or clean contact lists via groups
  • Schedule or modify Messenger drafts for newsletters

Frequently asked questions

1

What are the prerequisites for running the Sidemail MCP Server?

Node.js v18 or newer and a valid Sidemail API Key.

2

How do I configure the server in Claude Desktop?

Edit the `claude_desktop_config.json` file (location varies by OS) and add a server entry with `"command": "npx"`, `"args": ["-y", "@sidemail/mcp"]`, and the `"SIDEMAIL_API_KEY"` environment variable.

3

Can I send real transactional emails with this server?

The `send-email` tool sends transactional emails for testing purposes only.

4

What MCP clients are supported by this server?

It works with VS Code, Claude Desktop, Cursor, and any MCP client that supports stdio transport.

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