emailmd MCP server

emailmd

Write markdown. Ship emails. No HTMHELL.

emailmd converts markdown into responsive, email-safe HTML that works across Gmail, Outlook, Apple Mail, Yahoo, and every other client.

Install

npm install emailmd

Quick Start

import { render } from "emailmd";

const { html, text } = await render(`
# Welcome!

Thanks for signing up.

[Get Started](https://example.com){button}
`);

// html → complete email-safe HTML
// text → plain text version for text/plain MIME part

v0.3.0 migration: render() is now async. Update calls from render(md) to await render(md). Requires Node 20+ (MJML 5).

Charts & Data

Bar charts, progress meters, sparklines, KPI tiles, step trackers, and star ratings, each written as a plain markdown list:

::: chart
- Spotify: 16,900
- Apple Podcasts: 12,400
- Web player: 6,200
- RSS: 2,900
:::

They are drawn from table cells and text glyphs rather than images or SVG, so they still render when the client blocks remote images, and they redraw themselves in the plain-text part instead of collapsing to a list of numbers. See the directives reference.

CLI

emailmd also ships with a command-line interface.

# Render to HTML
emailmd input.md

# Write to file
emailmd input.md -o output.html

# Plain text output
emailmd input.md --text

# Pipe from another command
echo "# Hello" | emailmd

Run emailmd --help for all options.

React

@emailmd/react provides a live-preview hook (useEmailmd), an iframe component, and — the full builder as a drop-in component for your own app.

npm install @emailmd/react emailmd

Learn More

• Docs — full syntax reference, theming, frontmatter, directives, and API
• Templates — ready-made email templates you can copy and customize
• Builder — live editor to write and preview emails in your browser

MCP

emailmd ships a Model Context Protocol server, so an AI assistant can render, lint, and preview emails for you. It exposes three tools — render (markdown to email-safe HTML), lint (flag deliverability problems without rendering), and read_docs (look up emailmd syntax) — over either transport:

# Hosted (Streamable HTTP)
https://www.emailmd.dev/api/mcp

# Or run it locally over stdio
npx emailmd mcp

Published to the official MCP registry as dev.emailmd/emailmd. See the MCP docs for per-client setup.

AI

Prefer plain context over tools? emailmd is just markdown, so AI is great at writing templates. Feed the full docs to your AI tool:

https://www.emailmd.dev/llms-full.txt

Contributing

Contributions are welcome! Feel free to open an issue or submit a pull request.

emailmd is under active development. The API may change between minor versions until we hit 1.0 — breaking changes are always called out in the changelog. See Stability & Versioning for what the semver contract covers.

Acknowledgements

• Built with MJML under the hood
• Sponsored by Anypost

License

MIT