MCP server Rowsend

Rowsend MCP server

Rowsend is a desktop app for marketing email. It reads contacts from your own database (Postgres on Supabase or Neon, MySQL, PlanetScale, MongoDB or Firebase Auth) and sends through your own provider (SES, Postmark, Mailgun or SMTP). Contacts and keys stay on your computer.

This package connects an MCP client such as Claude Desktop, Cursor or Claude Code to the Rowsend app. Agents can connect your database, write campaigns in your brand, preview them and send you a test. You click Send in the app.

Requirements

• macOS, with Rowsend installed in Applications. Download it from rowsend.com.
• Node.js 18 or later.

Install

Claude Desktop, Cursor or any client with an mcpServers setting:

{
  "mcpServers": {
    "rowsend": { "command": "npx", "args": ["-y", "@rowsend/mcp"] }
  }
}

Claude Code:

claude mcp add rowsend -- npx -y @rowsend/mcp

Plugins for Claude Code and Codex

The plugin adds the MCP server and a rowsend-setup skill. The skill walks your agent through connecting your database and sender and drafting a first campaign.

Claude Code:

claude plugin marketplace add rowsend/mcp
claude plugin install rowsend@rowsend

Codex:

codex plugin marketplace add rowsend/mcp
codex plugin add rowsend@rowsend

The first time the client connects, Rowsend asks you to allow it. Click Allow. Rowsend keeps that client's token encrypted on your computer, so it asks only once. To cut a client off, revoke it in Rowsend → Settings → MCP.

If Rowsend is somewhere other than Applications, set ROWSEND_APP to its path, such as /Users/you/Apps/Rowsend.app.

What agents can do

Area	Tools
Projects	list_projects, create_project
Database	prepare_database_setup, complete_database_setup, open_database_setup, get_pending_setup, list_database_fields, set_contact_fields, get_data_source_status, sync_contacts, set_sync_interval
Sending setup	open_sender_setup, get_sender, verify_sender, setup_ses_bounce, setup_postmark_webhook, set_sending_limits
Contacts	list_contacts, list_segments, create_segment, preview_audience, add_suppression
Topics	list_topics, create_topic
Content	get_brand, list_templates, get_template, create_template, update_template, list_images, upload_image, preview_email
Campaigns	list_campaigns, get_campaign, create_campaign, update_campaign, duplicate_campaign, send_test, get_campaign_stats, pause_campaign, resume_campaign, cancel_campaign, retry_failures

What agents can't do

• Send or schedule a campaign. Only you can, in the app.
• Delete anything.
• See or type a password or API key. Rowsend opens its own screens for you to paste them.
• Turn off the unsubscribe footer, edit a segment or undo an unsubscribe.

The full guide is at rowsend.com/docs/agents/mcp.

How it works

Rowsend runs its MCP server inside the app, on 127.0.0.1 only. This package finds the app and starts it with --mcp-stdio, which passes messages between your client's stdin and stdout and that local server. If Rowsend isn't running, it opens in the background.

License

MIT. This license covers this launcher. The Rowsend app has its own terms.