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Emailens MCP

io.github.emailens/mcp · v0.13.0

New (7 days)

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Can write (some tools are not declared read-only)
Capabilities declared	prompts, tools
Tool definitions	13 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

Description written by the publisher, not verified

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

Connect

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

claude mcp add --transport http mcp https://emailens.dev/api/mcp

{
  "mcpServers": {
    "mcp": {
      "url": "https://emailens.dev/api/mcp"
    }
  }
}

Tools as reported by the server

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.

Repository · Website · JSON · Text for agents · Registry updated 2026-10-23