io.github.emailens/mcp

pkg:npm:@emailens/mcp

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

transport:: remote + stdio
credential class:: open
repo:: https://github.com/emailens/mcp

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Tools

analyze_email
Quick CSS compatibility analysis , returns warnings and per-client scores.
shallow
audit_email
Comprehensive quality audit , CSS compatibility, spam, links, accessibility, images, inbox preview, size, templates, content overflow, visual bugs.
shallow
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.
shallow
check_deliverability
Check email deliverability for a domain , SPF, DKIM, DMARC, MX, BIMI.
shallow
diff_emails
Compare two email HTML versions , shows score changes, fixed issues, and regressions per client.
shallow
fix_email
Generate a structured fix prompt for email compatibility issues.
shallow
get_build_status
Check a build_email run by runId , returns status, iteration, best compatibility score, and the current best source once available.
shallow
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.
shallow
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.
shallow
sandbox_get_inbox
Retrieve or auto-create your Emailens sandbox test email address for capturing test emails.
shallow
sandbox_get_message
Get complete email details: HTML/text body, parsed headers, spam score, SPF/DKIM/DMARC auth status, and validated links.
shallow
sandbox_list_messages
List recently captured test emails in the Emailens sandbox.
shallow
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).
shallow

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