"author:arbengine" matching MCP servers:

• mailbox-mcp

  arbengine

  A

  license

  A

  quality

  B

  maintenance

  Official mailbox.bot MCP server for AI agents. Send letters, certified mail, postcards, and receive scanned inbound physical mail with sandbox keys, approval controls, tracking, and webhooks.

  Last updated 2026-07-08

  29

  64

  2

  MIT