Emailens Mcp
About
MCP server for email compatibility analysis. Analyze, preview, diff, and fix HTML emails across 15 email clients — plus capture real screenshots and create shareable links with an optional API key.
Details
- Author
- emailens
- Categories
- Other, Automation, Developer Tools, Communication
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Setup
Install Emailens Mcp in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/emailens/mcp
Follow the installation instructions in the repository README, then restart your MCP client.
Email rendering analysis for AI assistants
MCP server for email compatibility analysis. Analyze, preview, diff, and fix HTML emails across 21 email clients — plus capture real screenshots and create shareable links with an optional API key.
Why your assistant needs this: across the 255 CSS and HTML features we track, only 6 are fully supported in every major email client (see the data). Ask Claude to check your email before you send it.
Built on@emailens/engine. Also available as aGitHub Action.
{ "mcpServers": { "emailens": { "command": "npx", "args": ["-y", "@emailens/mcp"] } } }
claude mcp add emailens -- npx -y @emailens/mcp
With API Key (optional — unlocks screenshots + sharing)
{ "mcpServers": { "emailens": { "command": "npx", "args": ["-y", "@emailens/mcp"], "env": { "EMAILENS_API_KEY": "ek_live_..." } } } }
Get your free API key atemailens.dev/settings/api-keys.
Use the hosted endpoint — no npm or Node.js needed. API key required.
{ "mcpServers": { "emailens": { "url": "https://emailens.dev/api/mcp", "headers": { "Authorization": "Bearer ek_live_..." } } } }
Full email compatibility preview — transforms HTML for 21 clients, analyzes CSS, generates scores, simulates dark mode, checks inbox preview and email size.
Quick CSS compatibility analysis — returns per-client scores and warnings. Faster thanaudit_emailwhen you only need CSS compatibility.
Comprehensive quality audit — CSS compatibility, spam scoring, link validation, accessibility, images, inbox preview, size (Gmail clipping), template variables, content overflow, and visual bugs.
Generate a structured fix prompt for compatibility issues. Returns markdown with fix instructions that the AI can apply directly.
List all 21 supported email clients with IDs, names, engines, and dark mode support.
Compare two email HTML versions — shows score changes, fixed issues, and introduced issues per client.
Check email deliverability for a domain — SPF, DKIM, DMARC, MX, BIMI records with a score and actionable issues.
Hosted Tools (requireEMAILENS_API_KEY)
Capture real email screenshots across 21 clients in real browsers. Screenshots are hosted on CDN.
Create a shareable link. Recipients see the full analysis without an account.
Requires Dev plan ($9/mo). Share links expire after 7 days (Dev) or never (Pro).
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