io.github.emailens/mcp

up checked 2026-11-11T10:37:24.207Z

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Publisher-provided title

Emailens MCP

Publisher-provided description

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

Summary by lookupd

Analyzes, audits, fixes, and diffs HTML email compatibility across 21 clients, plus deliverability checks and sandbox test inboxes.

Install

Claude Code, remote (streamable-http)

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

Claude Code, npm package (stdio)

claude mcp add mcp -- npx -y @emailens/mcp

Codex, remote (streamable-http)

codex mcp add mcp --url https://emailens.dev/api/mcp

Codex, npm package (stdio)

codex mcp add mcp -- npx -y @emailens/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

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

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@emailens/mcp"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (15 tools)

Publisher-provided text

• preview_email Full email compatibility preview , transforms HTML for 21 email clients, analyzes CSS, generates scores, previews dark mode, checks inbox preview and email size
• analyze_email Fix error and warning findings. Info findings are not problems (the email falls back safely there): never remove responsive (@media) or dark-mode CSS to clear t
• audit_email Fix error and warning findings, and restore anything listed in designRemovals. Info findings are not problems (the email falls back safely there): never remove
• 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 li
• diff_emails Compare two email HTML versions , shows score changes, fixed issues, and regressions per client.
• capture_screenshots Capture real email screenshots across 21 clients (Gmail, Outlook, Apple Mail, etc.) with light and dark mode variants. Screenshots are rendered in real browsers
• share_preview Create a shareable link for an email preview. Recipients see the full analysis without needing an account. Requires the Dev plan or above.
• 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 fram
• 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.

Details

• Version: 0.15.0
• Transports: streamable-http, stdio
• Uptime (7 days): 100%
• Median latency: 889 ms
• First indexed: 2026-11-01T09:29:04.341Z
• Last seen in registry: 2026-11-01T09:29:04.425Z
• Repository: https://github.com/emailens/mcp
• Website: https://emailens.dev/mcp

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• Last crawl: 2026-11-11T16:39:06.253Z
• API base: https://api.lookupd.com
• MCP URL: https://api.lookupd.com/mcp