Inbox Check — Email Deliverability Test MCP server

ldm-inbox-check-mcp

MCP server for Inbox Check —

programmatic email deliverability testing across 9 providers (Gmail,

Outlook, Yahoo, iCloud, AOL, GMX, T-Online, Mail.ru, Yandex) for AI agents.

📦 npm · 🌐 check.live-direct-marketing.online · ✨ awesome-mcp-servers · 🔍 Glama

Plug real inbox-placement testing into Claude Desktop, Cursor, Windsurf, Cline, or any other MCP-compatible AI client. The server wraps the Inbox Check REST API and exposes 5 tools your agent can call directly — create a test, send your email to the returned seed addresses, and read back per-provider placement (Inbox / Spam / Promotions / Updates), authentication results (SPF, DKIM, DMARC), headers, and screenshots.

Why use this?

T-Online, Mail.ru, Yandex. Not simulations: actual IMAP-backed seed accounts, actual filter verdicts.

• 9 real provider mailboxes — Gmail, Outlook, Yahoo, iCloud, AOL, GMX,

per delivery, parsed from Authentication-Results headers.

• Authentication verification — SPF, DKIM, DMARC alignment reported

Forums, Category-specific tabs where providers expose them.

• Folder detection — Inbox, Spam, Promotions, Updates, Social,

and others, so the agent can show the user what the recipient sees.

• Screenshots — rendered inbox/spam list view for Gmail, Outlook

agent only talks to a stable REST API.

• No flaky scraping — the service runs its own seed mailboxes; your

tool names, cursor pagination, idempotent keys.

• Built for AI agents — strict JSON schema via Zod, deterministic

What it does

Exposes 5 tools that wrap the Inbox Check REST API:

Install

npx ldm-inbox-check-mcp

No global install needed — Claude Desktop / Cursor / Windsurf / Cline will npx-run it on demand.

Get an API key

1. Go to .
2. Contact the operator for a key (self-service issuance coming later).
3. Copy the icplive... string — it's shown exactly once.

Configure your MCP client

Claude Desktop

Edit ~/Library/Application Support/Claude/claudedesktopconfig.json (macOS) or %APPDATA%\Claude\claudedesktopconfig.json (Windows):

{
  "mcpServers": {
    "inbox-check": {
      "command": "npx",
      "args": ["-y", "ldm-inbox-check-mcp"],
      "env": {
        "INBOX_CHECK_API_KEY": "icp_live_xxxxxxxxxxxxxxxxxxxxxxxx"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json:

{
  "mcpServers": {
    "inbox-check": {
      "command": "npx",
      "args": ["-y", "ldm-inbox-check-mcp"],
      "env": { "INBOX_CHECK_API_KEY": "icp_live_..." }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "inbox-check": {
      "command": "npx",
      "args": ["-y", "ldm-inbox-check-mcp"],
      "env": { "INBOX_CHECK_API_KEY": "icp_live_..." }
    }
  }
}

Cline (VS Code)

Shortened. The full README is on GitHub.