Emailens
Emailens
Catch what breaks across Gmail, Outlook, Apple Mail, and 18 more clients, in your editor, CLI, and CI. Framework-native fix snippets for React Email, MJML, and Maizzle. Open-source core, free to start.
https://emailens.devUse in your AI tool
Use the tools from this page
Opens ChatGPT on the web or desktop and asks it to use the WebMCP tools available here.
Connect the MCP server
Connect straight to this server’s public endpoint.
https://emailens.dev/api/mcpUse on MCPBundles
We add this server to your workspace, then open Studio — saved access, one connection to many servers, with a history of what ran.
Last probed Sep 14, 2026 · emailens.dev
9tools discovered
Tools discovered (9)
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 Email 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.
Get your MCP into directories
A working endpoint is step one. Directory coverage is the coordinated launch across ChatGPT, Claude, Cursor, the MCP Registry, and community indexes.
Directory coverage for brandsFrequently Asked Questions
What is the Emailens MCP server?
Catch what breaks across Gmail, Outlook, Apple Mail, and 18 more clients, in your editor, CLI, and CI. Framework-native fix snippets for React Email, MJML, and Maizzle. Open-source core, free to start.
How do I connect Emailens to my AI agent?
Use the MCP endpoint listed on this page in your MCP client configuration. One-click install pills support Claude, Cursor, VS Code, and other hosts. Copy the remote MCP URL if your client needs a manual entry.
How many tools does Emailens provide?
MCPBundles probed 9 tools on the live server. The tool list on this page reflects what was discovered at the last refresh — connect your client to see the full set available to your session.
What authentication does Emailens require?
No provider sign-in was required during MCPBundles' probe. Your client may still need MCPBundles credentials depending on how you connect.
Maintain this listing
Operate Emailens? Verify ownership to take over this directory entry.
Operate Emailens?
This server appears in the MCPBundles directory. Verify you operate it to take over the listing — name, description, logo, contact email, and skill content. We email a 6-digit code to a maintainer address your server publishes in /.well-known/security.txt or /.well-known/mcpbundles.json. Free, takes about a minute.
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