Changelog & versioning

The merchant API is served unversioned under /api. The public hosted checkout is versioned under /api/v1. Breaking changes are announced here in advance.

1. 2026-07

   Latest

   Checkout API v1

   The hosted checkout moved to /api/v1/checkout and now returns a dedicated Checkout resource with a store branding object; the checkout_url and policy fields were removed. It accepts cross-origin requests without credentials and is rate-limited per invoice and client IP (429 when exceeded).

2. 2026-07

   Embedded checkout

   Create an invoice with pay_with, list an invoice's payable coins, and select a coin to get the deposit address. Payments can now be driven entirely from the API. API-key responses no longer include the policy object.

3. 2026-07

   Initial developer documentation

   Invoices, hosted checkout, and signed webhooks are documented and live.