# Human Mailbox (remote · humanmailbox.com)

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

- Trust score: 62/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `humanmailbox.com`: 62/100 (this document), [markdown](https://verifymcp.io/servers/com-humanmailbox-mailbox/humanmailbox.md), [page](https://verifymcp.io/servers/com-humanmailbox-mailbox/humanmailbox)

## Channel facts

- Endpoint: `https://humanmailbox.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 15 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 60/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 3698 tokens (~115/item across 32 items; 32 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 82/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 46% of tool parameters carry a description.
- **Tool Safety**: 75/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - 0 of 3 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "pay_item" implies "pay" and declares no destructiveHint at all, which the MCP spec reads as destructive by default.
  - An AI judge read all 33 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Human Mailbox MCP server?

Human Mailbox is a hosted endpoint at https://humanmailbox.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-humanmailbox-mailbox 'https://humanmailbox.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-humanmailbox-mailbox": {
      "url": "https://humanmailbox.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-humanmailbox-mailbox": {
      "type": "http",
      "url": "https://humanmailbox.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-humanmailbox-mailbox]
url = "https://humanmailbox.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-humanmailbox-mailbox": {
      "type": "remote",
      "url": "https://humanmailbox.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-humanmailbox-mailbox --url 'https://humanmailbox.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-humanmailbox-mailbox:
    url: "https://humanmailbox.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-humanmailbox-mailbox": {
      "Transport": "http",
      "Url": "https://humanmailbox.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-humanmailbox-mailbox -t streamable-http -u 'https://humanmailbox.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-humanmailbox-mailbox": {
      "type": "http",
      "url": "https://humanmailbox.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 62, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 61, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 60, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 59, 0)

- [security] The server rewrote its instructions, which are the text every model session reads
- [security] Tool “buy_bundle” rewrote its description, which is the text the model reads
- [security] Tool “get_prices” rewrote its description, which is the text the model reads
- [security] Tool “get_subscription” rewrote its description, which is the text the model reads
- [security] Tool “request_action” rewrote its description, which is the text the model reads
- [functional improvement] Stability: unverified → 0.03

### 2026-10-29 (score 59)

First indexed and scored.

## MCP tools (32)

### `register_mailbox` (~386 tokens)

Register a 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 runs on its own with limits (250 € in per month, letters only are forwarded, no parcels). address_name = the name on your mail (yours, an artist or made-up name; not a company, brand, authority or famous person). Read https://humanmailbox.com/legal/terms first.

Input parameters:

- `accept_terms` (boolean, required)
- `address_name` (string): Name on your mail (2–60 chars), e.g. your own or an artist name. Default: agent_name when there is no operator.
- `agent_model` (string)
- `agent_name` (string, required)
- `found_via` (string): Optional: where you found Human Mailbox (e.g. mcp_registry, smithery, glama, pulsemcp, mcp_so, x402_bazaar, x402scan, search_engine, llms_txt, github, hacker_news, reddit, x, word_of_mouth, other).
- `open_policy` (string): standard = open + scan within 3 business days (included), same_day = on arrival day (+2 €), never = keep sealed.
- `operator_country` (string)
- `operator_email` (string)
- `operator_name` (string): Responsible human or company. Optional: leave out (with operator_email) for a mailbox without a human, with limits.
- `operator_type` (string)
- `purpose` (string): What you will receive mail for.
- `webhook_url` (string): https URL that gets events (item.received, quote.ready ...).

### `start_demo` (~95 tokens)

Try it: demo mailbox

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 is shipped.

Input parameters:

- `agent_model` (string)
- `agent_name` (string)
- `found_via` (string)

### `express_interest` (~114 tokens)

Tell us you are interested

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.

Input parameters:

- `country_wanted` (string)
- `email` (string)
- `found_via` (string)
- `kind` (string)
- `name` (string)
- `use_case` (string)

### `get_prices` (~65 tokens)

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` (~47 tokens)

My account

Your account, balance, address and counts.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.

### `get_address` (~109 tokens)

My postal 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).

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `style` (string): company (default) or person.

### `buy_bundle` (~108 tokens)

Prepay letters

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.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `bundle` (string, required)

### `pay_item` (~71 tokens)

Pay for a waiting item

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `id` (string, required)

### `announce_shipment` (~123 tokens)

Announce a 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.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `carrier` (string)
- `description` (string)
- `expected_at` (string)
- `instructions` (string)
- `open_mode` (string)
- `sender` (string)
- `tracking` (string)

### `list_shipments` (~50 tokens)

Announced shipments

Your announced shipments.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `status` (string)

### `list_items` (~58 tokens)

Mail that arrived

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `status` (string)

### `get_item` (~62 tokens)

Look at an item

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `id` (string, required)

### `request_action` (~650 tokens)

Order an 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_base64 (4 € + postage; registered: einschreiben…). ship_out = returns/shipping for goods here with your label_pdf_base64 or an address (20 € + postage). digitize = receipts, QR codes, labels, serial numbers of an item as photo/PDF/JSON (15 €, say what in note). buy_voucher = we buy a permitted gift card (product, value_eur ≤ 100; face value + 10 %, min 5 €; quoted first, code goes to your vault). buy_item = we buy something only sold locally / by post (what, where, max_price_eur; price + 10 %, min 15 €; quoted first). courier, dispose, custom. Fixed parts are paid at once (balance or x402); quoted parts wait for a price (then accept_quote).

Input parameters:

- `action` (string, required)
- `address` (object): Destination for forward / courier.
- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `carrier` (string)
- `express` (boolean): forward only: dispatch the same day (+5 €).
- `item_id` (string)
- `label_pdf_base64` (string): ship_out: a prepaid shipping / return label as PDF, base64.
- `max_postage_eur` (number): forward/return: postage up to this amount is charged automatically.
- `max_price_eur` (number): buy_item: the most the item itself may cost (max 500).
- `note` (string)
- `output` (string): digitize: what you want back.
- `pdf_base64` (string): send_letter: the letter as an A4 PDF, base64 (max 5 MB, b/w, up to 10 pages).
- `product` (string): buy_voucher: which gift card / voucher.
- `reference` (string): ship_out: order or return number.
- `registered` (string): send_letter: registered mail (fee at cost).
- `same_day` (boolean): scan only: open + scan today (+2 € or 1 same-day credit).
- `sender` (object): Optional return address printed on the forwarded item. Must be you/your operator or their company.
- `shipment_id` (string): Pre-book for an announced shipment that has not arrived yet.
- `shop` (string)
- `text` (string): send_letter: the letter as plain text (printed as is).
- `value_eur` (number): buy_voucher: face value (max 100).
- `what` (string): buy_item: what to buy.
- `where` (string): buy_item: shop or place, if known.

### `list_requests` (~51 tokens)

My orders

Your orders and their status.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `status` (string)

### `get_request` (~55 tokens)

One order

One order with result notes, tracking and files.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `id` (string, required)

### `accept_quote` (~61 tokens)

Accept a quote

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `id` (string, required)

### `cancel_request` (~61 tokens)

Cancel an order

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `id` (string, required)

### `list_codes` (~63 tokens)

Code vault

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.

### `reveal_codes` (~80 tokens)

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.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `ids` (array)

### `request_invoice` (~133 tokens)

Request an 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 €250 the full address is required.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `billing` (object)
- `email` (string)
- `payment_ids` (array)

### `list_invoices` (~56 tokens)

Invoices

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.

### `contact_human` (~241 tokens)

Ask the human (inquiry)

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), feature_request, problem, question, other. A human answers, usually within one business day. Without api_key you get a ticket: read the answer with check_inquiry.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `body` (string, required): What you need or want to know.
- `budget_eur` (number)
- `deadline` (string)
- `email` (string): Optional: where the answer should go.
- `location` (string)
- `method_wanted` (string): topic payment_method: the method you want (e.g. lightning, usdc-solana, sepa, card).
- `name` (string)
- `subject` (string)
- `topic` (string)

### `check_inquiry` (~77 tokens)

Answer to an inquiry

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `id` (string, required)
- `ticket` (string)

### `get_balance` (~44 tokens)

Balance

Your balance and recent transactions.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.

### `get_summary` (~57 tokens)

Costs and orders overview

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.

### `get_subscription` (~68 tokens)

Mailbox subscription

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.

### `pay_subscription` (~66 tokens)

Prepay the mailbox

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `months` (integer)

### `update_account` (~160 tokens)

Change account settings

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).

Input parameters:

- `address_name` (string)
- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `auto_reveal_codes` (boolean)
- `budget_eur_month` (number|null)
- `open_policy` (string)
- `operator_email` (string)
- `operator_name` (string)
- `purpose` (string)
- `webhook_url` (string)

### `top_up` (~118 tokens)

Top up balance

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.

Input parameters:

- `amount_eur` (number)
- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `bundle` (string)
- `method` (string, required)

### `check_top_up` (~59 tokens)

Check a top-up

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

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `id` (string, required)

### `send_message` (~77 tokens)

Message the human

Write to the human who handles your mail.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.
- `body` (string, required)
- `item_id` (string)
- `request_id` (string)
- `subject` (string)

### `list_messages` (~45 tokens)

Messages

Messages between you and the human.

Input parameters:

- `api_key` (string): Your hm_... key. Only needed if your MCP client cannot send the "Authorization: Bearer" header.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-humanmailbox-mailbox/humanmailbox#diagnostics

## Score history

- 2026-11-05: 62
- 2026-11-04: 61
- 2026-11-03: 61
- 2026-11-02: 60
- 2026-11-01: 60
- 2026-10-31: 60
- 2026-10-30: 59
- 2026-10-29: 59

## Common questions

### What is the Human Mailbox MCP server?

Human Mailbox is an MCP server listed in the public MCP registry as com.humanmailbox/mailbox. A physical postal address in Germany for AI agents. A human opens, scans and forwards your mail. This page covers its hosted endpoint (https://humanmailbox.com/mcp).

### Is the Human Mailbox MCP server safe to use?

Human Mailbox scores 62 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Human Mailbox MCP server expose?

Human Mailbox exposes 32 tools: register_mailbox, start_demo, express_interest, get_prices, get_account, and 27 more. Their descriptions and schemas cost roughly 3,510 tokens of context every time the server is loaded.

### Does the Human Mailbox MCP server require authentication?

No. We connected to Human Mailbox without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Human Mailbox MCP server still maintained?

Human Mailbox is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://humanmailbox.com/mcp
- Website: https://humanmailbox.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-humanmailbox-mailbox/humanmailbox.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-humanmailbox-mailbox/humanmailbox.json
- HTML version of this page: https://verifymcp.io/servers/com-humanmailbox-mailbox/humanmailbox