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Accounts and keys are not open yet. When they are, this page is where you get a free sandbox key.

What you will get

  1. An email with a link to confirm the address. Following it opens your account.
  2. A sandbox key starting htd_test_. It reads three fictional governments, Port Ellery, Marlow County and Tolland Township, in exactly the shapes live data comes in, at up to 10 requests a minute. It is free.
  3. When you add a card, a live key starting htd_live_, billed per 1,000 requests at a flat rate, under a monthly cap you set. Live keys open once the rates are final. See pricing.

The same key works for the hosted MCP server and the REST API. The docs show both.

Library card application

No. htd_test_...

Sign-ups open soon. The free sandbox key comes with them. Until then this card is closed and takes nothing.

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The sandbox reads fictional towns and needs no card. Add a card when you want a live key.