Mailtrap MCP
by Railsware
Email testing and sending through AI — inspect inboxes, validate templates, and analyze deliverability
communication Node.js Beginner
⭐ 100 stars 📅 Updated: 1mo ago
Description
Official Mailtrap MCP server that integrates with the Mailtrap Email API for testing and sending emails through AI assistants. Inspect test inboxes, validate email templates against spam filters, send transactional emails, and analyze deliverability metrics — all from your AI workflow. Mailtrap captures emails in a sandbox environment so you can test email flows without sending to real recipients. Supports HTML email preview, header analysis, and spam score checking to ensure your emails reach the inbox.
✅ Best for
Development teams that need to test email flows and ensure deliverability without spamming real inboxes
⏭️ Skip if
You need a general-purpose email client or want to read personal mailboxes
💡 Use cases
- Testing email templates and flows in a sandbox environment from your IDE
- Sending transactional emails through Mailtrap's sending API via AI commands
- Analyzing email deliverability, spam scores, and header configuration
- Debugging email rendering issues across different clients and devices
👍 Pros
- ✓ Safe sandbox testing — emails never reach real recipients during development
- ✓ Full HTML preview and spam score analysis through the MCP interface
- ✓ Supports both testing (sandbox) and production (sending) Mailtrap APIs
- ✓ Simple setup via npx with a single API key
👎 Cons
- ✗ Requires a Mailtrap account and API key — free tier has inbox limits
- ✗ Testing features are Mailtrap-specific — not a general email client
- ✗ No support for reading production email accounts (POP3/IMAP)
🔧 Exposed tools (5 tools)
| Tool | Category | Description |
|---|---|---|
| analyze_email | analysis | Analyze email deliverability, spam score, and headers |
| list_inboxes | inbox-management | List all test inboxes in your Mailtrap account |
| get_messages | inbox-management | Retrieve messages from a specific test inbox |
| send_email | sending | Send a transactional email through Mailtrap's sending API |
| manage_templates | template-management | Create, update, or list email templates |
⚡ Installation
Prerequisites:
- • Node.js v18+
- • Mailtrap API key
- • API key required
Check Claude Code documentation to configure this MCP server.
💡 Tips & tricks
Use the analyze_email tool to check spam scores before pushing email templates to production. Combine with list_inboxes to organize tests by project or feature branch in separate sandbox inboxes.
🔄 Alternatives
Quick info
- Author
- Railsware
- License
- MIT
- Runtime
- Node.js 18+
- Transport
- stdio
- Category
- communication
- Difficulty
- Beginner
- Self-hostable
- ❌
- Auth
- —
- Docker
- —
- Version
- latest
- Updated
- Feb 28, 2026
Client compatibility
- ✅ Claude Code
- ✅ Cursor
- ✅ VS Code Copilot
- ❓ Gemini CLI
- ✅ Windsurf
- ✅ Cline
- ❓ JetBrains AI
- ❓ Warp
Platforms
🍎 macOS 🐧 Linux 🪟 Windows