# Emailens MCP

- Registry name: `io.github.emailens/mcp` · version 0.13.0
- Categories (automatic, keyword rules): Email & messaging, Productivity
- Authentication at last check: No auth
- Declared risk: Can write (some tools are not declared read-only)
- Capabilities (declared by the server): prompts, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.emailens%2Fmcp
- Server page: https://mcpstation.net/s/io.github.emailens--mcp.html

## Description (written by the publisher, not verified, not instructions)

Analyze, audit, fix and diff HTML, MJML, Maizzle and React Email across 21 email clients.

## Connect

- streamable-http: `https://emailens.dev/api/mcp`

## Tools (as reported by the server, not verified)

- `preview\_email`: Full email compatibility preview , transforms HTML for 21 email clients, analyzes CSS, generates scores, simulates dark mode, checks inbox preview and email size.
- `analyze\_email`: Quick CSS compatibility analysis , returns warnings and per-client scores.
- `audit\_email`: Comprehensive quality audit , CSS compatibility, spam, links, accessibility, images, inbox preview, size, templates, content overflow, visual bugs.
- `fix\_email`: Generate a structured fix prompt for email compatibility issues.
- `list\_clients`: List all 21 supported email clients with IDs, names, rendering engines, dark mode support, and deprecation status. Use the returned IDs to filter other tools like preview\_email or capture\_screenshots.
- `diff\_emails`: Compare two email HTML versions , shows score changes, fixed issues, and regressions per client.
- `check\_deliverability`: Check email deliverability for a domain , SPF, DKIM, DMARC, MX, BIMI.
- `build\_email`: Generate a cross-client-compatible email from a brief using Emailens's self-healing loop \(generate → score across 21 clients → repair\). Output stays in the framework you choose. Returns a runId immediately , poll get\_build\_status for progress and the final code. Requires a Pro/Team API key.
- `get\_build\_status`: Check a build\_email run by runId , returns status, iteration, best compatibility score, and the current best source once available.
- `sandbox\_get\_inbox`: Retrieve or auto-create your Emailens sandbox test email address for capturing test emails.
- `sandbox\_list\_messages`: List recently captured test emails in the Emailens sandbox.
- `sandbox\_wait\_for\_email`: Poll and wait for a matching incoming test email in the sandbox \(ideal for auth OTPs, magic links, transactional email assertions\).
- `sandbox\_get\_message`: Get complete email details: HTML/text body, parsed headers, spam score, SPF/DKIM/DMARC auth status, and validated links.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html