SuperMailbox MCP Server

io.github.hardtab/supermailboxv0.1.0

Search connected email, read and manage messages, draft and send, and manage rules for new mail.

remoteofficial registry

context tax

pending

security

pending

cold start

hosted

freshness

Active3d ago

Our reading of SuperMailbox, from the data

SuperMailbox is a email MCP server, listed in the official MCP Registry.

We haven't measured its tool list yet, so its token cost is unknown.

Maintenance is active: the last public signal was 3 days ago (2026-10-16). For comparison, 75% of email servers are active or maintained.

It runs as a hosted endpoint, so there is nothing to install.

Install SuperMailbox MCP server

claude mcp add --transport http supermailbox https://api.supermailbox.app/mcp

{
  "mcpServers": {
    "supermailbox": {
      "url": "https://api.supermailbox.app/mcp"
    }
  }
}

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

Or add it as a custom connector under Settings → Connectors. The config above bridges via mcp-remote.

{
  "servers": {
    "supermailbox": {
      "type": "http",
      "url": "https://api.supermailbox.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "supermailbox": {
      "serverUrl": "https://api.supermailbox.app/mcp"
    }
  }
}

Remote endpoints

streamable-httphttps://api.supermailbox.app/mcp

Freshness

Active — last maintenance signal 3d ago. The newest of the signals below sets the band.

Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-16 · 3d ago · official registry · v0.1.0

How it compares in Email

Against the most-starred email servers we index. Token cost is per model turn, measured from each server's live tool list.

Server	Stars	Tools	Tokens / turn	Freshness	Runs
SuperMailbox (this)	—	—	not measured	Active	hosted
Inbox Zero	12,649	—	not measured	Active	hosted
Useplunk	5,524	—	not measured	Active	local
Google Workspace	3,370	—	not measured	Active	—
OpenOSINT	1,776	—	not measured	Active	local
emailmd	1,382	3	954	Active	local + hosted

All email MCP servers

FAQ

›How do I install the SuperMailbox MCP server in Claude Code?

Run: claude mcp add --transport http supermailbox https://api.supermailbox.app/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does SuperMailbox require an API key?

No required environment variables are declared in its published metadata.

›Can I use SuperMailbox as a remote (hosted) MCP server?

Yes. It is a hosted MCP server; connect to its URL with any client that supports remote MCP.

›Is SuperMailbox in the official MCP registry?

Yes, as io.github.hardtab/supermailbox.

Sources and method

Official MCP Registry entry: updated 2026-10-16
Last checked against all sources: 2026-10-19

The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.