Frostmailer MCP

Order cold-email infrastructure from any MCP client: Claude Code, Claude Desktop, Cursor, Codex, and more. Provisions Microsoft (Outlook) or Google Workspace inboxes on their own domains, DNS auth pre-configured, ready to plug into any sending tool.

Setup

1. Create an API key at app.frostmailer.com/developers.
2. Connect the server (the key is the only credential you need).

Claude Code

claude mcp add --env FROSTMAILER_API_KEY=fm_live_... --transport stdio frostmailer -- npx -y frostmailer-mcp

Claude Desktop / Cursor / Codex — add to your MCP config:

{
  "mcpServers": {
    "frostmailer": {
      "command": "npx",
      "args": ["-y", "frostmailer-mcp"],
      "env": { "FROSTMAILER_API_KEY": "fm_live_..." }
    }
  }
}

Tools

| Tool | What it does | | --- | --- | | create_order | Place an order. Returns a Stripe checkout_url to pay — nothing is provisioned until payment. | | list_orders | List your orders and their status. | | get_order | A single order with its status timeline and domains. | | list_inboxes | The mailboxes on an order (email, sender name, status, domain). Passwords are not returned. | | list_domains | Every domain you own. | | check_domain | Check whether domains are available before ordering. | | cancel_order | Request cancellation (flags it for the retention team). | | get_account | Your profile + a live subscription summary. |

Environment

| Variable | Required | Default | | --- | --- | --- | | FROSTMAILER_API_KEY | yes | — | | FROSTMAILER_BASE_URL | no | https://app.frostmailer.com/api/v1 |