groundmail-mcp

Groundmail MCP server

Send transactional email and manage domains, templates, webhooks and suppressions
from Claude, Claude Code, ChatGPT, Cursor and any other MCP client.

Docs · Get a free account · groundmail.dev

Quick start

The fastest way is the hosted server. Add the URL, sign in through your browser, and you're done. No API key to copy.

https://mcp.groundmail.dev/mcp

Client	How to connect
Claude Code	claude mcp add --transport http groundmail https://mcp.groundmail.dev/mcp, then run /mcp, pick groundmail and choose Authenticate
Cursor	Add { "mcpServers": { "groundmail": { "url": "https://mcp.groundmail.dev/mcp" } } } to .cursor/mcp.json; Cursor shows "Needs login"
Claude.ai	Settings → Connectors → Add custom connector → paste the URL
ChatGPT	Settings → Apps & Connectors → Create (developer mode) → paste the URL, authentication OAuth

When you connect, you choose the access: Full, Send only or Read only. Revoke it any time in Groundmail under Settings → CLIs & agents.

What you can ask for

"Send a password reset email to [e-mail] from [e-mail]."

"Did my last 10 emails get delivered? Show any bounces."

"Add mail.acme.com as a sending domain and apply the DNS records on Cloudflare."

"How is my deliverability over the last 7 days?"

Tools cover emails (send, list, look up), domains (add, apply DNS through Cloudflare, Vercel or GoDaddy, verify), templates, webhooks, suppressions, address validation, deliverability, DMARC monitoring, imports from other providers and tenants (one per customer you send for: create, update, pause, resume, stats; tenant on sends, domains and suppressions). Each tool carries read-only and destructive annotations and an output schema. Full list: docs.groundmail.dev/ai/mcp.

Transports

Mode	Command / URL	Auth
HTTP (hosted)	https://mcp.groundmail.dev/mcp	OAuth (recommended) or Authorization: Bearer gm_…
stdio	npx -y groundmail-mcp	GROUNDMAIL_API_KEY=gm_…
HTTP (local)	npx -y groundmail-mcp --http --port 3000	Authorization: Bearer gm_… on each request

Optional: GROUNDMAIL_API_URL (for example http://localhost:3003/api against a local API).

Local HTTP endpoint: http://127.0.0.1:3000/mcp · health: GET /health Hosted health: GET https://mcp.groundmail.dev/health

Cursor with an API key (stdio)

.cursor/mcp.json:

{
  "mcpServers": {
    "groundmail": {
      "command": "npx",
      "args": ["-y", "groundmail-mcp"],
      "env": {
        "GROUNDMAIL_API_KEY": "gm_your_key_here"
      }
    }
  }
}

Cursor with an API key (local or hosted HTTP)

npx -y groundmail-mcp --http --port 3000

{
  "mcpServers": {
    "groundmail": {
      "url": "http://127.0.0.1:3000/mcp",
      "headers": {
        "Authorization": "Bearer gm_your_key_here"
      }
    }
  }
}

For the hosted server with a key instead of OAuth, use "url": "https://mcp.groundmail.dev/mcp" with the same header.

Claude Code with an API key

# Hosted, API key
claude mcp add --transport http groundmail https://mcp.groundmail.dev/mcp \
  --header "Authorization: Bearer $GROUNDMAIL_API_KEY"

# Local stdio
claude mcp add groundmail --env GROUNDMAIL_API_KEY=gm_your_key_here -- npx -y groundmail-mcp

Want your coding agent to know Groundmail too? Install the agent skills: npx skills add Groundmail/groundmail-skills -y.

Why Groundmail

• Our own mail servers and IP space. Your password resets and receipts don't share a pool with bulk marketing senders.
• Transactional email only. No newsletters or cold outreach on the platform, which keeps the sending reputation clean.
• Start free. 3,000 emails a month on the Free plan; Pro is 50,000 emails for $20/month. Dedicated IPs on Scale.
• Built for code and for agents. REST API, SMTP, SDKs for Node, Python, Go, PHP and Ruby, a CLI, and an MCP server for Claude, ChatGPT and Cursor.

All Groundmail libraries

Use	Package
Node.js / TypeScript	groundmail on npm
Python (Django), Go, Ruby (Rails Action Mailer)	Groundmail/groundmail-sdks
PHP	Groundmail/groundmail-php
Laravel	Groundmail/groundmail-laravel
Symfony Mailer	Groundmail/groundmail-symfony-mailer
Nodemailer	Groundmail/groundmail-nodemailer
NestJS	Groundmail/nestjs-groundmail
Strapi	Groundmail/strapi-provider-email-groundmail
Medusa	Groundmail/medusa-notification-groundmail
AdonisJS	Groundmail/adonisjs-groundmail
Phoenix (Swoosh)	Groundmail/swoosh_groundmail
CLI	groundmail-cli on npm
MCP server (Claude, ChatGPT, Cursor)	Groundmail/groundmail-mcp
Agent skills and Claude Code plugin	Groundmail/groundmail-skills
Email templates (React Email, MJML, HTML)	Groundmail/email-templates

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