# Emailens MCP

> Use this tool when you need to ensure seamless email rendering across multiple clients, solving compatibility issues and improving deliverability. It analyzes emails on 15 different clients, providing previews, audits, and fixes to identify and resolve problems. Input your email content and receive output on compatibility, with features like diff and deliverability testing to optimize your email campaigns.

Canonical page: https://skillsregistry.net/skills/io-github-emailens-mcp  
JSON: https://api.skillsregistry.net/v1/skills/io-github-emailens-mcp

## Description

Email compatibility analysis across 15 clients — preview, audit, fix, diff, deliverability.

## Trust

- **Trust score (0–1):** 0.99
- **Verification tier:** verified
- **Last scanned:** 2026-09-19

## Facts

- **Version:** 0.4.1
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** communication
- **Updated:** 2026-09-19

## Source

- **Source listing:** [MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/io.github.emailens%2Fmcp)
- **Repository:** <https://github.com/emailens/mcp>

## Use it

MCP endpoint published by the skill: `https://emailens.dev/api/mcp`

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "io-github-emailens-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/io-github-emailens-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/io-github-emailens-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt