Analyze email HTML across 15 email clients for rendering issues, preview how your design looks in Gmail, Outlook, Apple Mail, and more. Built for developers who need to catch compatibility bugs before sending.
io.github.emailens/mcp
https://emailens.dev/api/mcp
HTTP
No auth required
How models use it and what it is built for.
Analyze email HTML across 15 email clients for rendering issues, preview how your design looks in Gmail, Outlook, Apple Mail, and more. Built for developers who need to catch compatibility bugs before sending.
Hosted endpoint — paste into any MCP client.
Configuration this server reads at startup.
API key for screenshots and sharing. Get one free at emailens.dev/settings/api-keys
Where to find authoritative docs and source for Emailens.
Paste any of these into Agent Studio after connecting Emailens.
Common questions about connecting and running Emailens.
What email clients does this server test?
It tests across 15 major email clients including Gmail, Outlook, Apple Mail, and others. The registry lists it as a compatibility analysis tool covering preview, audit, fix, and diff capabilities.
Do I need an API key to use this MCP server?
Yes, you need an EMAILENS_API_KEY for screenshots and sharing features. You can get a free API key at emailens.dev/settings/api-keys.
How do I install and connect this server?
Install via npm with `npx @emailens/mcp@0.4.1`. The server runs over HTTP and connects to the hosted endpoint at https://emailens.dev/api/mcp.
Can this server fix rendering issues it finds?
Yes, the registry metadata indicates it has a 'fix' capability alongside preview, audit, and diff features, so it can help remediate compatibility problems.
What's the difference between this and manual email testing?
This MCP server automates testing across 15 clients at once and provides structured diffs and deliverability audits, saving you from manually checking each client individually.
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