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PopNx MCPMCP servers for people who use AI · explained in plain words

Human Mailbox

by humanmailbox.comversion 1.0.0i★ –iRuns in the cloud
Registry namecom.humanmailbox/mailbox

Install

Overview

Description from the maker (original English)

A physical postal address in Germany for AI agents. A human opens, scans and forwards your mail.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

  • Connection: Runs in the cloud
  • Transport: Streamable HTTP
  • Category: Other
  • You need to fill in: Authorization

Install

Pick the AI app you use, then copy the settings.

Before you install

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http mailbox https://humanmailbox.com/mcp --header 'Authorization: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "mailbox": {
      "url": "https://humanmailbox.com/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "mailbox": {
      "type": "http",
      "url": "https://humanmailbox.com/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

  • Authorization secret HTTP header
    Bearer from register_mailbox or start_demo. Not needed for register_mailbox, start_demo, get_prices, contact_human, check_inquiry and express_interest.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.

  • register_mailbox

    Create your own mailbox at a physical street address in Germany. Returns an API key (shown once) and a mailbox code HM-XXXXX that must be written on every envelope. operator_* is the responsible human or company (the contract partner). No human? Leave operator_* out: the mailbox

  • start_demo

    Free demo mailbox, no registration: play money (€60 + letter credits), a scanned sample letter and a sealed sample parcel, a sample gift card code. A simulated human handles your orders about 20 seconds later. Returns an api_key for all other tools. Deleted after 7 days; nothing

  • express_interest

    No account needed. Not ready to register, or need something we do not offer yet (another country, a feature)? Leave a note: kind (agent | human), name, email (optional), country_wanted, use_case, found_via. We tell you when it is available.

  • get_prices

    Prices in EUR: mailbox 15 € per 30 days (3 letters included), letter 3 € (open + scan), parcel 9 €, bundles, same-day, forwarding, all 8 services (send letters, vouchers, purchases, digitizing, returns), payment methods.

  • get_account

    Your account, balance, address and counts.

  • get_address

    The street address to put on letters and parcels, with your mailbox code in the first line. For registrations that need a first and last name, style "person" gives your operator's name with "c/o Human Mailbox HM-…" in the next line (never invent a name).

  • buy_bundle

    Buy a bundle of letter credits (letters_1 3 €, letters_10 25 €, letters_100 200 €) or same-day credits (same_day_10, same_day_100). Every arriving letter uses 1 credit, a parcel 3. Paid from balance or inline with x402.

  • pay_item

    An item that arrived without credits or balance waits unopened (payment_status unpaid). Pay it here (credits, balance or x402).

  • announce_shipment

    Tell the human that something is on its way (tracking number helps). To have something done as soon as it arrives, call request_action with the returned shipment_id.

  • list_shipments

    Your announced shipments.

  • list_items

    Everything that arrived for you, newest first, with photo links.

  • get_item

    Details of one arrived item; photos and scans are returned as images you can see.

  • request_action

    Ask the human to do something with your mail, documents or parcels. scan = open + scan (included; same_day: true = today, +2 €). forward = 3 € (letter) / 5 € (parcel) handling + postage (express: +5 €). return. send_letter = we print and post a letter you give as text or pdf_base

  • list_requests

    Your orders and their status.

  • get_request

    One order with result notes, tracking and files.

  • accept_quote

    Accept the quoted price of an order (status quote_ready) and pay it.

  • cancel_request

    Cancel an order that has not started; paid money goes back to your balance.

  • list_codes

    Gift card / voucher codes that arrived by mail. Waiting codes show only label and last characters; revealed codes include the code.

  • reveal_codes

    Reveal waiting codes (1 € per code, from balance or x402). Give ids, or nothing to reveal all waiting codes. Codes not retrieved within 24 months expire.

  • request_invoice

    Only if you need an invoice: creates one (free, no VAT under § 19 UStG) for your payments that have none yet, or for the given payment_ids, and emails it (default: your operator email). Nothing is invoiced unless you call this. billing.name defaults to the operator name; over €25

  • list_invoices

    Invoices you requested (with full text), plus payments that have no invoice yet.

  • contact_human

    Works without an account. For anything that is not a standard order: topic special_request (a job not in the price list: say what, where, when, budget_eur), is_it_possible (ask before you send mail for it), payment_method (your payment method is missing: give method_wanted), feat

  • check_inquiry

    Status and answers of an inquiry from contact_human. Give its id and the ticket (or use your api_key).

  • get_balance

    Your balance and recent transactions.

  • get_summary

    This month: costs by kind, budget used, subscription, open orders, mail and shipments.

  • get_subscription

    The mailbox costs 15 € per 30 days (3 letters opened and scanned included) and renews from your balance: status and paid_until.

  • pay_subscription

    Prepay 1–12 mailbox months (15 € each) from your balance or with x402.

  • update_account

    Set budget_eur_month (spending limit for orders, null = none), webhook_url, open_policy (standard | same_day | never), address_name (name on your mail), auto_reveal_codes, or name your human operator (operator_name + operator_email).

  • top_up

    Add money (EUR): method x402 (pay now in USDC at the current rate), btc (get a Bitcoin address + amount) or paypal (get a link for your human operator). Give amount_eur, or bundle to buy that bundle as soon as it is paid.

  • check_top_up

    Re-check whether a Bitcoin or PayPal top-up was paid.

  • send_message

    Write to the human who handles your mail.

  • list_messages

    Messages between you and the human.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 10, 2026

  • ! Caution

    Maker matches the repo

    The registry lists no source repo, so we cannot match the publisher (humanmailbox.com) to the code

  • … Not checked yet

    Still maintained

    We have not read this repo from GitHub yet

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • ✓ Pass

    Endpoint responds

    Responded in 104 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 32 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

  • More stars than 0% of the other 19064 servers in this category
  • Published to the registry more recently than 77% of the other 19064 servers in this category
  • Basic checks equal to or better than 40% of the other 19064 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Human Mailbox safe?

It passed 2 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: Authorization

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 12 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: World Monitor, Claude Flow, Tldraw

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

World Monitor

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by koala73Widely used★ 90.4KUpdated 5 days ago

Runs in the cloud✓ worldmonitor.app

Claude Flow

AI orchestration with hive-mind swarms, neural networks, and 87 MCP tools for enterprise dev.

by ruvnetWidely used↓ 14.3K/wk★ 81.4KUpdated 14 months ago

Runs on your computer

Tldraw

Draw and visually collaborate with your agents on tldraw's canvas.

by tldrawWidely used★ 51.4KUpdated 8 months ago

Runs in the cloud

README from the maker

No README found in the repo

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