Groundmail

Name: Groundmail
Author: Groundmail

by Groundmailversion 0.29.1i★ –iComputer or cloud

Registry nameio.github.Groundmail/groundmail

Install

Overview

Description from the maker (original English)

Send transactional email and manage domains, templates, webhooks and suppressions with Groundmail.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi3 of 3 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Chat & email
You need to fill in: GROUNDMAIL_API_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 3 of 3 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: GROUNDMAIL_API_KEY, GROUNDMAIL_API_URL

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet
npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://mcp.groundmail.dev/mcp

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

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

Run this in your terminal

claude mcp add --transport http groundmail https://mcp.groundmail.dev/mcp

Or run it on your computer

claude mcp add groundmail --env GROUNDMAIL_API_KEY=your-value --env GROUNDMAIL_API_URL=your-value -- npx -y groundmail-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "groundmail": {
      "url": "https://mcp.groundmail.dev/mcp"
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "groundmail": {
      "type": "http",
      "url": "https://mcp.groundmail.dev/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "groundmail": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "groundmail-mcp"
      ],
      "env": {
        "GROUNDMAIL_API_KEY": "your-value",
        "GROUNDMAIL_API_URL": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://mcp.groundmail.dev/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

GROUNDMAIL_API_KEY secret required env
Groundmail API key (starts with gm_). Create one at https://app.groundmail.dev/api-keys
GROUNDMAIL_API_URL env
Optional API base URL override (default https://api.groundmail.dev)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

The server asks you to sign in before it lists its tools.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Groundmail, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
✓ Pass
Endpoint responds
Responded in 724 ms (HTTP 401)
✓ Pass
Sign-in with OAuth
Declares OAuth sign-in, so your AI app can take you to log in
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Chat & emaili

More stars than 0% of the other 1762 servers in this category
Published to the registry more recently than 99% of the other 1762 servers in this category
Basic checks equal to or better than 100% of the other 1762 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Groundmail safe?

It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: GROUNDMAIL_API_KEY

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.29.1) reached the registry today.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Vexa

by Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago

Install

emailmd

by anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

Computer or cloud★ 1,385MITUpdated 30 days ago

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MCP WhatsApp Cloud

by codespar

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

Runs on your computer★ 277MITUpdated 5 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

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 ada@example.com from noreply@mail.acme.com."

"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, email testing (a test address per run, then wait for the email and read its code and links), 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. Free covers 3,000 emails a month. After that, pay as you go is $15 a month with 20,000 emails included, then from $0.70 per 1,000, less as you grow. Pricing
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

Website · Docs · Pricing · Sign up free

Groundmail

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

Quick start

What you can ask for

Transports

Local stdio

Why Groundmail

All Groundmail libraries