Community · Official remote MCP server

The Mailbox MCP server,
connected in one click.

Physical mail API for AI agents. Send letters, certified mail. Sandbox + live keys via MCP. Connect the official Mailbox MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Free to start · No credit card · No hosting needed

What you can do

What your AI can do with Mailbox

Real prompts you can type the moment it's connected — no setup, no docs to read.

Use “get_mailbox”: Get your agent's real mailing address beta endpoint when the account has explicit beta access: street address + mailbox number for approved.

Use “get_usage”: Get usage summary, billing events, and prepaid credit balance for a time period. Returns itemized events (scans, forwards, mail sends) with.

Use “list_inbound_forwarding_addresses”: List the renter’s private inbound forwarding aliases on forward.mailbox.bot. These are the unique intake email addresses an operator, assist.

Use “list_inbound_mail”: List forwarded inbound mail items captured from private forwarding aliases. Default output includes compact draft_context so an LLM or exter.

Security check

How secure is the Mailbox MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Mailbox holds up.

Verified directory serverMailbox · mailbox.bot

Official endpoint

Operated by Mailbox (mailbox.bot) at its documented MCP endpoint — not a third-party mirror or community re-host.

No sign-in needed

This server only exposes public data — no account and no credentials are involved when you connect.

Scanned before it goes live

gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.

Watched for drift

If Mailbox adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

How it works

Connected in three steps

01

Connect your gate

Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.

02

Pick Mailbox

Choose Mailbox in the gate directory. No sign-in needed.

03

Use it anywhere

Mailbox's tools are live in every AI client you've connected — with rules and logging built in.

Connect Mailbox free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools Mailbox exposes

Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.

get_mailboxGet your agent's real mailing address beta endpoint when the account has explicit beta access: street address + mailbox number for approved

get_usageGet usage summary, billing events, and prepaid credit balance for a time period. Returns itemized events (scans, forwards, mail sends) with

list_inbound_forwarding_addressesList the renter’s private inbound forwarding aliases on forward.mailbox.bot. These are the unique intake email addresses an operator, assist

list_inbound_mailList forwarded inbound mail items captured from private forwarding aliases. Default output includes compact draft_context so an LLM or exter

get_inbound_mailGet one forwarded inbound mail item with compact draft_context by default. Use this before drafting an outbound reply when you need sender c

list_postal_threadsList physical-mail threads that group inbound mail context, human review, and outbound sends. Use this to understand which inbound items and

get_postal_threadGet one physical-mail thread with optional timeline events. Use this to explain how a generated outbound mail piece relates back to prior in

get_mailbox_mdGet the renter's MAILBOX.md standing instructions for this agent. Returns the full instruction text, version number, content hash, and last

+ 11 more tools once connected

Server facts

The Mailbox MCP server at a glance

Endpointhttps://mailbox.bot/api/mcp
Operated byMailbox (mailbox.bot)
CategoryCommunity
Sign-inNone — public data only
Available in gateYes — one-click connect
Works withClaude, ChatGPT, Cursor & any MCP client
FAQ

Questions, answered

Is there an official Mailbox MCP server?

Yes — Mailbox operates its own remote MCP server at mailbox.bot. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.

How do I connect Mailbox to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick Mailbox in the directory. No account or sign-in is needed. From then on, Mailbox's tools are available in every client you've connected to gate.

Do I need to host anything?

No. Mailbox runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the Mailbox MCP server safe to connect?

It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.

Is it free?

Yes — you can get started with gate for free and connect Mailbox in minutes. No credit card required.

More servers

Connect more than just Mailbox

Every server below works through the same gateway URL — connect once, add tools anytime.

Set up Mailbox in: Claude · Claude Code · ChatGPT · Cursor · VS Code

Give your AI Mailbox — safely.

One URL. All MCPs. Full control. Free to start.

Get started free