MCP Servers · Communication

arbengine/mailbox-mcp

Name: arbengine/mailbox-mcp
Author: Various

Official MCP server for mailbox.bot — physical postal mail API for AI agents.

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Our verdict

Not reviewed yet

We have not reviewed arbengine/mailbox-mcp yet

No one at Enterprise DNA has checked this listing against its sources. The description comes from public listings gathered automatically. Any fact below shows where it came from and when it was last checked.

How we review records

From the listing

About arbengine/mailbox-mcp

An MCP server that exposes mailbox.bot's physical mail API to AI agents. It lets agents send and receive real postal mail programmatically via the Model Context Protocol.

Best for

Developers building AI agents that need to send or receive physical postal mail

Use cases

Sending physical letters or postcards from an AI agent
Receiving and processing incoming postal mail as structured data
Integrating physical mail workflows into LLM-based automation pipelines

Notes

1 stars on GitHub. Last updated 2026-06-15. Licensed MIT.

Pros

Bridges AI agents to real-world postal mail without human intervention
Simple MCP interface for standard tool-calling integration
Low overhead for adding physical mail capability to existing agent setups

Cons

Only 1 GitHub star indicates very early or niche adoption
Relies on external mailbox.bot service for actual mail handling
Limited documentation and community support due to small project size

Key facts

What we have checked

Days since the last commit: 3; Checked 26 Oct 2026GitHub
GitHub forks: 0; Checked 26 Oct 2026GitHub
GitHub stars: 2; Checked 26 Oct 2026GitHub
Open issues: 2; Checked 26 Oct 2026GitHub
Releases in the last 90 days: 3; Checked 26 Oct 2026GitHub

Each value shows when we last confirmed it and where it came from. Values we have not confirmed are left out, never guessed.

How to use

How to set it up

As the listing publishes it. We have not run this install.

Install

npm start

Clients the listing names (not checked here)

Claude Desktop, Claude Code, Cursor

Install

Add arbengine/mailbox-mcp to your client

Not verified yet

Our lab has not run this server yet. "Config checked" on a client means the recipe matches that client's documented config format; it does not mean we ran it.

Claude Code

Config checked

Run in your terminal (remote server)

claude mcp add --transport http arbengine-mailbox-mcp https://mailbox.bot/api/mcp --header 'Authorization: Bearer YOUR_ARBENGINE_MAILBOX_MCP_TOKEN'

Needs ARBENGINE_MAILBOX_MCP_TOKEN: replace each YOUR_ value with your own.

Version 1.0.4 · From the Official MCP registry, read 24 Oct 2026 · Format checked against Claude Code's config docs

Cursor

Config checked

Add to .cursor/mcp.json (remote server)

{
  "mcpServers": {
    "arbengine-mailbox-mcp": {
      "url": "https://mailbox.bot/api/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_ARBENGINE_MAILBOX_MCP_TOKEN"
      }
    }
  }
}

Needs ARBENGINE_MAILBOX_MCP_TOKEN: replace each YOUR_ value with your own.

Version 1.0.4 · From the Official MCP registry, read 24 Oct 2026 · Format checked against Cursor's config docs

VS Code

Config checked

Add to .vscode/mcp.json (remote server)

{
  "inputs": [
    {
      "type": "promptString",
      "id": "arbengine-mailbox-mcp-token",
      "description": "Bearer token. Use an agent key (sk_agent_...) for autonomous agents, a sandbox key (sk_agent_test_...) for zero-charge testing on production endpoints, or a member key (sk_live_...) for personal use. ",
      "password": true
    }
  ],
  "servers": {
    "arbengine-mailbox-mcp": {
      "type": "http",
      "url": "https://mailbox.bot/api/mcp",
      "headers": {
        "Authorization": "Bearer ${input:arbengine-mailbox-mcp-token}"
      }
    }
  }
}

Needs ARBENGINE_MAILBOX_MCP_TOKEN: replace each YOUR_ value with your own.

Version 1.0.4 · From the Official MCP registry, read 24 Oct 2026 · Format checked against VS Code's config docs

Codex

Config checked

Add to ~/.codex/config.toml (remote server)

[mcp_servers.arbengine-mailbox-mcp]
url = "https://mailbox.bot/api/mcp"
bearer_token_env_var = "ARBENGINE_MAILBOX_MCP_TOKEN"

Needs ARBENGINE_MAILBOX_MCP_TOKEN: replace each YOUR_ value with your own.

Version 1.0.4 · From the Official MCP registry, read 24 Oct 2026 · Format checked against Codex's config docs

Claude Desktop: Its config file takes local servers only; a remote server is added in the app as a connector.
ChatGPT: ChatGPT connects only to remote servers that need no API key.

Recipes come from the server's entry in the official MCP registry. Check the package name before you run it, and keep keys out of shared files.

Works with

What arbengine/mailbox-mcp connects to

4 clients, each with how we know and when we checked.

Works with	Type	How we know	Checked
Claude Code	Client	Install recipe matches the client's documented formatRemote server, version 1.0.4Config checked	24 Oct 2026Claude Code docs
Cursor	Client	Install recipe matches the client's documented formatRemote server, version 1.0.4Config checked	24 Oct 2026Cursor docs
VS Code	Client	Install recipe matches the client's documented formatRemote server, version 1.0.4Config checked	24 Oct 2026VS Code docs
Codex	Client	Install recipe matches the client's documented formatRemote server, version 1.0.4Config checked	24 Oct 2026Codex docs

Health and security

Is arbengine/mailbox-mcp looked after, and what do its setup files show

Health score

81 out of 100

Does someone look after this repository? It does not say the code is good or safe. Worked out from GitHub signals checked 26 Oct 2026. How it is worked out

Part	Points	What we saw
Recent activity	30 of 30	Last push 3 days ago
Releases	15 of 15	3 releases in 90 days
Issue replies	Not counted	The latest check has no issue response reading (fewer than 3 measured issues, or issues switched off)
Maintainer	0 of 15	Owned by a single user
Official source	20 of 20	Official server

Sources

Where this comes from

GitHubRegistry
Checked 26 Oct 2026 · Days since the last commit, GitHub forks, GitHub stars, Open issues, Releases in the last 90 days

A source shows what was published when we checked it. It does not certify security, performance or a working installation. Read our method.

Changelog

What changed

No changes recorded yet. Releases, price changes and deprecations appear here, with their dates, once we track them for this record.

Pairs with

Other entries in the index that connect to this one. Click through to see the chain.

Built with1 entry

MMCPlowCatalogue

FastMCP

Various

🚀 The fast, Pythonic way to build MCP servers and clients.

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