Changelog

The additions and changes to API v1, newest first. Within a version, we only add, as Compatibility says.

v2 launches in early 2027, and v1 is supported for years after it. Moving from v1 to v2 says what changes.

2026-05-05

Add Dankort to Apple Pay, and Apple Pay to subscribers.

2024-07-12

Add initial charges: creating or renewing a subscriber with "items" also charges it, in the same request.

2023-03-04

Add Apple Pay.

2022-07-06

Add "method", the payment method, to the transactions and subscribers that seq returns.

2019-09-27

Add the capture API.

2019-06-06

Add idempotency to the charge subscriber request.

2019-05-29

Enter captures, refunds, and voids into the sequence. Before, a transaction's acts were included whenever the transaction was returned, but an act did not by itself put the transaction into the sequence, so it would typically go unreported.

2018-10-13

Add the subscriber API.

2018-04-26

Add MobilePay.

Rename the item field "price" to "total". "price" was multiplied by "quantity", so a unit price with fractions of the minor currency unit had to be rounded before the multiplication, and the rounding error grew with the quantity. This moves the decimal multiplication to the client, which is what the unmultiplied price was meant to avoid.