Emailens MCP server

Connect Emailens and your agent gets 9 tools, among them analyze_email, audit_email, build_email. It answers at https://emailens.dev/api/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 22 October 2026, succeeded.

Status

Answering

Tools

Reliability

6 of 6 checks

Response time

257 ms

Transport

streamable HTTP

Last checked

22 October 2026

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

Description as the publisher wrote it.

The 9 tools Emailens offers

Tool	What it does
`analyze_email`	Quick CSS compatibility analysis , returns warnings and per-client scores. Inputs: html, format
`audit_email`	Comprehensive quality audit , CSS compatibility, spam, links, accessibility, images, inbox preview, size, templates, content overflow, visual bugs. Inputs: html, format, skip
`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 progre Inputs: intent, format, seedHtml, threshold, maxIterations
`check_deliverability`	Check email deliverability for a domain , SPF, DKIM, DMARC, MX, BIMI. Inputs: domain
`diff_emails`	Compare two email HTML versions , shows score changes, fixed issues, and regressions per client. Inputs: before, after, format
`fix_email`	Generate a structured fix prompt for email compatibility issues. Inputs: html, format, scope, selectedClientId
`get_build_status`	Check a build_email run by runId , returns status, iteration, best compatibility score, and the current best source once available. Inputs: runId
`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. Inputs: html, clients, format

Add Emailens to your AI client

Every block below points at https://emailens.dev/api/mcp. Pick your client and copy.

Claude Code: one command in your terminal

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

Claude Desktop: claude_desktop_config.json

{
  "mcpServers": {
    "emailens": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://emailens.dev/api/mcp"]
    }
  }
}

Cursor: ~/.cursor/mcp.json, or .cursor/mcp.json in a project

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

VS Code and GitHub Copilot: .vscode/mcp.json

{
  "servers": {
    "emailens": {
      "type": "http",
      "url": "https://emailens.dev/api/mcp"
    }
  }
}

Zed: Zed settings.json

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

Windsurf: ~/.codeium/mcp_config.json

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

JetBrains AI Assistant: Settings, Tools, AI Assistant, MCP, New MCP Server, as JSON

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

Continue: .continue/mcpServers/neuronto.yaml

name: Emailens
version: 0.0.1
schema: v1
mcpServers:
  - name: Emailens
    type: streamable-http
    url: https://emailens.dev/api/mcp

Gemini CLI: ~/.gemini/settings.json

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

Codex CLI: MCP server config

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

Warp: MCP servers, + Add, paste JSON

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

Goose: a one-click extension link

goose://extension?url=https%3A%2F%2Femailens.dev%2Fapi%2Fmcp&type=streamable_http&id=emailens&name=Emailens

Is Emailens up right now?

It answered our last check on 22 October 2026 in 257 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.

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Questions about Emailens

How many tools does Emailens have?

9, as returned by the server's own tools/list on 14 September 2026: analyze_email, audit_email, build_email, check_deliverability, diff_emails, fix_email, get_build_status, list_clients, and 1 more.

Is Emailens down?

It answered our last check on 22 October 2026 in 257 ms. Over 6 checks since 11 September 2026 it answered 6.

How do I add Emailens to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://emailens.dev/api/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does Emailens need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: io.github.emailens. Endpoint host: emailens.dev. ARD identifier: urn:air:io.github.emailens:mcp:mcp. First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.

Is this your server? Get a message the day it stops answering or its tools change: monitoring, 14 days free. Or claim the domain to manage how it is listed.