# Emailens MCP

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

- name: io.github.emailens/mcp
- version: 0.12.0
- connection class: R0 (autonomous)
- trust: 96/100
- quality: 91/100 (strong)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.emailens%2Fmcp
- tools: https://api.protogrid.dev/v1/servers/io.github.emailens%2Fmcp/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

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


## Trust

- hygiene: 100
- liveness: 97
- freshness: 100
- provenance: 90
- drivers: +repository +namespace-matches-repo +website +reachable +uptime-92% +updated-1d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 91/100 (strong)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 13 of 13 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 1,862 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 4 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: deps.dev does not know @emailens/mcp@0.12.0

- tools: 13, about 1,862 tokens to load them all
- tool set hash: e51c1436319de48f3708d875ec97c7d6
- tools last changed: 2026-10-06T13:45:58.785Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.emailens/mcp.svg)](https://protogrid.dev/servers/io.github.emailens/mcp)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-06 `sandbox_get_message` added
  - Get complete email details: HTML/text body, parsed headers, spam score, SPF/DKIM/DMARC auth status, and validated links.
- 2026-10-06 `sandbox_wait_for_email` added
  - Poll and wait for a matching incoming test email in the sandbox (ideal for auth OTPs, magic links, transactional email assertions).
- 2026-10-06 `sandbox_list_messages` added
  - List recently captured test emails in the Emailens sandbox.
- 2026-10-06 `sandbox_get_inbox` added
  - Retrieve or auto-create your Emailens sandbox test email address for capturing test emails.

Full history: https://api.protogrid.dev/v1/servers/io.github.emailens%2Fmcp/changes

## Dependencies

- npm @emailens/mcp@0.12.0: unknown

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0.

## Remotes

- https://emailens.dev/api/mcp (streamable-http, auth none, reachable true, uptime30d 0.9174312)

## Packages

- npm @emailens/mcp@0.12.0 secrets: EMAILENS_API_KEY

## Tools (13)

- `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.
- `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.
- `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 like preview_email or capture_screenshots.
- `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.
- `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).