mailbox MCP server

None of its 32 tools are described as changing anything. For 32 the reading was uncertain, so no mark is shown.

• register_mailbox

  “Create your own mailbox at a physical street address in Germany.”

  Publisher declares: open-world yes

  12 inputs, 2 required

  • agent_namestringrequired
  • address_namestring“Name on your mail (2–60 chars), e.g.”
  • operator_namestring“Responsible human or company.”
  • operator_emailstring
  • accept_termsbooleanrequired
  • operator_typestring
  • operator_countrystring
  • purposestring“What you will receive mail for.”
  • agent_modelstring
  • webhook_urlstring“https URL that gets events (item.received, quote.ready ...).”
  • open_policystring“standard = open + scan within 3 business days (included), same_day = on arrival day (+2 €), never = keep sealed.”
  • found_viastring“Optional: where you found Human Mailbox (e.g.”
• start_demoon 1 other server

  “Free demo mailbox, no registration: play money (€60 + letter credits), a scanned sample letter and a sealed sample parcel, a sample gift card code.”

  3 inputs

  • agent_namestring
  • agent_modelstring
  • found_viastring
• express_intereston 1 other server

  “No account needed.”

  6 inputs

  • kindstring
  • namestring
  • emailstring
  • country_wantedstring
  • use_casestring
  • found_viastring
• get_priceson 48 other servers

  “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, retur…”

  Publisher declares: read-only yes · open-world no

  Takes no inputs.

• get_accounton 123 other servers

  “Your account, balance, address and counts.”

  Publisher declares: read-only yes · open-world no

  1 input

  • api_keystring“Your hm_...”
• get_addresson 8 other servers

  “The street address to put on letters and parcels, with your mailbox code in the first line.”

  Publisher declares: read-only yes · open-world no

  2 inputs

  • stylestring“company (default) or person.”
  • api_keystring“Your hm_...”
• 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).”

  2 inputs, 1 required

  • bundlestringrequired
  • api_keystring“Your hm_...”
• pay_item

  “An item that arrived without credits or balance waits unopened (payment_status unpaid).”

  2 inputs, 1 required

  • idstringrequired
  • api_keystring“Your hm_...”
• announce_shipment

  “Tell the human that something is on its way (tracking number helps).”

  8 inputs

  • carrierstring
  • trackingstring
  • senderstring
  • descriptionstring
  • expected_atstring
  • instructionsstring
  • open_modestring
  • api_keystring“Your hm_...”
• list_shipmentson 3 other servers

  “Your announced shipments.”

  Publisher declares: read-only yes · open-world no

  2 inputs

  • statusstring
  • api_keystring“Your hm_...”
• list_itemson 14 other servers

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

  Publisher declares: read-only yes · open-world no

  2 inputs

  • statusstring
  • api_keystring“Your hm_...”
• get_itemon 46 other servers

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

  Publisher declares: read-only yes · open-world no

  2 inputs, 1 required

  • idstringrequired
  • api_keystring“Your hm_...”

Each quoted sentence is the first sentence of the publisher’s own description. The kind of tool and the “changes data” mark are our AI model’s reading of that description, not something we tested: two differently worded runs had to agree, otherwise no label is shown, and nobody has checked them by hand. A tool without the “changes data” mark is described as only reading, searching or calculating, or the two runs did not agree. No tool was called. Read the publisher’s full description before relying on it. “Publisher declares” lists the hints the server itself sends with the tool (MCP annotations: read-only, destructive, idempotent, open-world); they are the publisher's claims, not checked by us. Inputs are the parameters in the tool's own input schema: name, declared type, whether it is required, and the first sentence of its description. Read 2026-10-30.

The registry checks an entry when it is published (each new version), and nothing re-checks it on a schedule. A difference below is about the listing, not a judgement of the publisher.