Adds Affirm as a supported payment method for one-time invoices and subscriptions

What’s new

Introduces support for Affirm on the Hosted Invoice Page, as well as for Subscriptions and Invoices with collection_method=send_invoice.

To use Affirm on the Hosted Invoice Page with dynamic payment methods, enable it in your Dashboard payment method settings. Otherwise, include affirm in payment_settings.payment_method_types when you create a Subscription or an Invoice with collection_method=send_invoice.

Value	Change	Enums
affirm	Added	Invoice#create.payment_settings.payment_method_types Invoice#update.payment_settings.payment_method_types Invoice.payment_settings.payment_method_types + 3 more Subscription#create.payment_settings.payment_method_types Subscription#update.payment_settings.payment_method_types Subscription.payment_settings.payment_method_types

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If you use an SDK, upgrade to the corresponding SDK version for this API version.
- If you don’t use an SDK, update your API requests to include Stripe-Version: 2025-04-30.basil
Upgrade the API version used for webhook endpoints.
Test your integration against the new version.
If you use Connect, test your Connect integration.
In Workbench, perform the upgrade. You can roll back the version for 72 hours.