EmptyInbox MCP Server

by blockonomicsio.github.cnohall/emptyinboxv1.5.0

Zero-config disposable email inboxes for AI agents: create, read mail, await verify codes.

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Active1d ago

Install EmptyInbox MCP server

claude mcp add blockonomics -e EMPTYINBOX_API_KEY='<emptyinbox-api-key>' -- npx -y emptyinbox-mcp

{
  "mcpServers": {
    "blockonomics": {
      "command": "npx",
      "args": [
        "-y",
        "emptyinbox-mcp"
      ],
      "env": {
        "EMPTYINBOX_API_KEY": "<emptyinbox-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "blockonomics": {
      "command": "npx",
      "args": [
        "-y",
        "emptyinbox-mcp"
      ],
      "env": {
        "EMPTYINBOX_API_KEY": "<emptyinbox-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "blockonomics": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "emptyinbox-mcp"
      ],
      "env": {
        "EMPTYINBOX_API_KEY": "<emptyinbox-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "blockonomics": {
      "command": "npx",
      "args": [
        "-y",
        "emptyinbox-mcp"
      ],
      "env": {
        "EMPTYINBOX_API_KEY": "<emptyinbox-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
EMPTYINBOX_API_KEY	—	yes	Existing EmptyInbox API key. Omit to auto-register a free account on the first tool call that needs one; the key is then written to ~/.emptyinbox.json.

Freshness

Active — last maintenance signal 1d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-08 · 1d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-08 · 1d ago · official registry · v1.5.0

FAQ

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

Run: claude mcp add blockonomics -e EMPTYINBOX_API_KEY='<emptyinbox-api-key>' -- npx -y emptyinbox-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does EmptyInbox require an API key?

Yes. It expects EMPTYINBOX_API_KEY, of which 1 is a secret.

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

No hosted endpoint is published; it runs locally over stdio.

›Is EmptyInbox in the official MCP registry?

Yes, as io.github.cnohall/emptyinbox.