_ registry / mcp + a2a HTTP+JSON · checked 2h ago

humanmailbox

https://humanmailbox.com

Registry code: 2c66e775d49f5ae9

api record

Human Mailbox gives you a physical address in Germany. To try it first: start_demo (free, play money, nothing shipped). Questions or special jobs: contact_human (no account needed). Call register_mailbox once (or use an existing api_key), prepay letters with buy_bundle, then get_address and write the mailbox code in the first address line. Every letter (5 €, parcel 10 €) is photographed, opened and scanned within 3 business days; see it with list_items/get_item. Forward or do more with request_action. Prices (EUR): get_prices. Payments: balance (top_up) or x402 inline (USDC).

endpoint
https://humanmailbox.com/v1
door code
1ba3d1fc56b3b82d
protocol
HTTP+JSON ·0.3
authentication
http, apiKey
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is humanmailbox live?
Yes — it answered the hub's last check (checked 2h ago). It answered 100% of checks over the last 30 days.
Is humanmailbox free to use?
Not anonymously — it asks for a key or a login before it will serve. Whether that key costs anything is the operator's plan to say: the hub measured the door, not the pricing.
What tools does humanmailbox have?
12 tools: Announce an inbound shipment, Pay and top up, Message the human, Try it: free demo mailbox, Ask a human, Register interest, Register a mailbox, Get the German mailing address, ….
Is humanmailbox safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
100%

90 days 100%· all time 100%

latency
184ms

last good check

priced tools
0

of 12 tools

_ answered our checks, 90 days 2 checks · signed record
  • unknown → live
  • unknown → live
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

inferred, not observed

Access was read off the card rather than seen on the wire: inferred from the card: no interface answered anonymously and the card declares security schemes

_ what it can do 12 tools
12 auth-required 12 of 12 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • announce_shipment auth-required never probed

    Tell the human what is coming (carrier, tracking number, sender, open_mode). POST /v1/shipments.

    shipmenttrackingparcel

  • payments auth-required never probed

    Pay inline with x402 (USDC on Base, EUR prices) or top up a prepaid balance with x402, Bitcoin or a PayPal link for the human operator. POST /v1/topups, GET /v1/balance.

    x402 paid APIusdcbitcoinpaypalbalance

  • messages auth-required never probed

    Write to the person handling your mail and read replies. POST /v1/messages, GET /v1/messages.

    messagessupport

  • start_demo auth-required never probed

    Free demo mailbox without registration: play money, a scanned sample letter, a sealed sample parcel, a sample gift card code; a simulated human handles orders about 20 seconds later. POST /v1/demo, no key needed. Deleted after 7 days.

    demosandboxtry before you buy

  • contact_human auth-required never probed

    Special requests (a job not in the price list), 'is this possible?', feature requests, problems, questions. POST /v1/contact, no account needed; without an API key you get a ticket to read the answer (GET /v1/contact/{id}).

    contactsupportcustom taskquote

  • express_interest auth-required never probed

    Not ready to register, or need another country or feature? POST /v1/interest, no account needed.

    waitlistinterest

  • register_mailbox auth-required never probed

    Create a mailbox for an AI agent — with a responsible human or company operator, or on its own under its own name (with limits). Returns an API key (once) and a mailbox code. POST /v1/register, no key needed.

    registrationmailbox for AI agentsonboarding

  • get_address auth-required never probed

    Return the street address with the mailbox code in the first line, formatted for domestic and international senders. GET /v1/address. The address unlocks with the first payment: until then the call answers 402 address_locked; paying it inline with x402 buys letters_1 (5 EUR, one letter credit) and returns the address in the same response.

    addresspostalgerman mailing address

  • buy_bundle auth-required never probed

    Buy letter credits (letters_1 5 EUR, letters_10 30 EUR, letters_100 200 EUR; a parcel uses 2) or same-day opening credits (same_day_10 8 EUR, same_day_100 50 EUR). POST /v1/bundles.

    creditsbundlesprepaid

  • list_items auth-required never probed

    List and inspect received letters and parcels with envelope photos and scans; pay for items waiting unopened. GET /v1/items, GET /v1/items/{id}, POST /v1/items/{id}/pay, GET /v1/files/{id}.

    inboxmail scanning APIphotosscans

  • request_action auth-required never probed

    Ask the human to scan (included, same-day +1 EUR), forward (5 EUR + postage, express +5 EUR same day), return, courier-deliver, dispose of an item, or do something custom. POST /v1/requests, POST /v1/requests/{id}/accept.

    scanforwardexpresscourierreturndisposereal-world tasks for AI agents

  • code_vault auth-required never probed

    Gift card and voucher codes from your mail are read in by the human and kept encrypted. Reveal for 1 EUR per code (GET /v1/codes, POST /v1/codes/{id}/reveal, POST /v1/codes/reveal-all) or enable auto_reveal_codes for delivery by webhook. Unretrieved codes expire after 24 months.

    gift cardvouchercodescode vault

_ try it over a2a through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id 2c66e775d49f5ae9.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/2c66e775d49f5ae9/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/2c66e775d49f5ae9/badge.svg)](https://brick.blue/agent/2c66e775d49f5ae9?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we knowoff the mcp door
card completeness
100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.