MCP Server

Connect Transmit to Claude, Cursor, and other AI tools for email management via Model Context Protocol.

Connect your Transmit workspace to AI assistants like Claude, Cursor, Windsurf, ChatGPT, and other MCP-compatible clients. Manage campaigns, templates, contacts, and senders through natural language.

Zero install. Just paste a URL, connect your account, and go.

Setup

Add the Transmit MCP server to your client. The first time you connect, a browser window opens where you log in with your API key. That's it.

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "transmit": {
      "url": "https://mcp.xmit.sh/mcp"
    }
  }
}

claude mcp add transmit --url https://mcp.xmit.sh/mcp

Add to your Cursor MCP settings:

{
  "mcpServers": {
    "transmit": {
      "url": "https://mcp.xmit.sh/mcp"
    }
  }
}

{
  "mcpServers": {
    "transmit": {
      "serverUrl": "https://mcp.xmit.sh/mcp"
    }
  }
}

Any MCP client that supports Streamable HTTP can connect to https://mcp.xmit.sh/mcp. OAuth is handled automatically.

How Auth Works

Your MCP client connects to mcp.xmit.sh/mcp
A browser window opens with the Transmit authorization page
Enter your API key (find it in Dashboard > Settings > API Keys, starts with pm_live_*)
Click Authorize
The MCP client receives a token and stores it automatically
All subsequent requests are authenticated. Tokens refresh automatically.

Don't have an API key yet? Create an account, then go to Settings > API Keys to generate one.

Available Tools

Email Sending

Tool	Description
`send_email`	Send a transactional email with HTML or a template

Contacts

Tool	Description
`add_contact`	Add a contact to a mailing list

Senders

Tool	Description
`list_senders`	List all senders with verification status
`get_sender`	Get sender details by ID or email

Templates

Tool	Description
`list_templates`	Search and list templates
`get_template`	Get template with full HTML body
`create_template`	Create a new template
`update_template`	Update an existing template
`delete_template`	Delete a template

Campaigns

Tool	Description
`list_campaigns`	List campaigns with delivery stats
`get_campaign`	Get campaign details and stats
`create_campaign`	Create a campaign draft
`update_campaign`	Update a draft campaign
`delete_campaign`	Delete a campaign
`duplicate_campaign`	Clone a campaign as a new draft

Lists & Suppressions

Tool	Description
`get_lists`	List contact lists with counts
`list_suppressions`	List suppressed emails
`check_suppression`	Check if an email is suppressed

Guided Prompts

Two built-in prompts guide you through multi-step workflows:

create-campaign walks you through picking a sender, selecting a contact list, writing the email, and creating the campaign draft.

create-template helps you define variables, generate responsive HTML, and create a reusable template.

Examples

Here are some things you can ask your AI assistant with the Transmit MCP server connected:

"List all my email senders"
"Create a welcome email template with firstName and companyName variables"
"Show me my recent campaigns and their open rates"
"Check if user@example.com is on the suppression list"
"Duplicate the Black Friday campaign and update the subject line"
"Send a test email to myself using the welcome template"

Troubleshooting

"Authorization required" or connection fails: Your token may have expired. Remove the MCP server from your client config, re-add it, and authorize again.

"This endpoint is not accessible via API key": Make sure your API key has access to the endpoint you're trying to use. Some features (campaigns, lists) require a marketing plan.

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