# Emailens MCP server

Source: https://glimind.com/server/mcp-registry%2Fio.github.emailens%2Fmcp
Registry id: `mcp-registry/io.github.emailens/mcp`
Status: live (checked 2026-10-27T02:17:24.884Z)

## Verdict

Emailens MCP server answered 99.69% of Glimind's liveness checks over 30 days, better than 19% of MCP servers, with 812 ms median handshake and 4 outages in 90 days. Its agent-readiness grade is A (95/100) across 15 tools, costing an agent about 3,345 tokens to load. Checked every few minutes; no tool is ever called.

## Measurements (30 days)

| Metric | Value | Better than |
|---|---|---|
| Uptime, 30 days | 99.69% | 19% of MCP servers |
| Median handshake latency | 812 ms | 29% of MCP servers |
| p95 handshake latency | 1320 ms | — |
| Checks in 30 days | 2,271 | — |
| Outages, 90 days | 4 | — |
| Median recovery | 1 min | — |
| Agent-readiness score | 95/100 (A) | 80% of MCP servers |
| Tools | 15 | — |
| Tool-list size for an agent | ~3,345 tokens | 44% of MCP servers |
| Days observed | 29 | — |

## Install

```json
{
  "mcpServers": {
    "emailens-mcp-server": {
      "type": "http",
      "url": "https://emailens.dev/api/mcp"
    }
  }
}
```

Claude Code:

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

## Tools (15)

- `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 
- `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
- `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
- `check_deliverability`: Check email deliverability for a domain , SPF, DKIM, DMARC, MX, BIMI.
- `diff_emails`: Compare two email HTML versions , shows score changes, fixed issues, and regressions per client.
- `fix_email`: Generate a structured fix prompt for email compatibility issues.
- `get_build_status`: Check a build_email run by runId , returns status, iteration, best compatibility score, and the current best source once available.
- `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
- `preview_email`: Full email compatibility preview , transforms HTML for 21 email clients, analyzes CSS, generates scores, simulates dark mode, checks inbox preview and email siz
- `sandbox_get_inbox`: Retrieve or auto-create your Emailens sandbox test email address for capturing test emails.
- `sandbox_get_message`: Get complete email details: HTML/text body, parsed headers, spam score, SPF/DKIM/DMARC auth status, and validated links.
- `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).
- `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.

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.