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OpenAPI 3.0.1AGPL-3.0raw.githubusercontent.com2026-08-20257502895.6 KB

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Subscriptions

Preview a plan change (v2, swap in place)

Preview a subscription plan change without writing. Swap-in-place: subscription id, billing anchor and period bounds are preserved.

post/subscriptions/{id}/change/v2/preview

Path parameters

idstring required

Subscription ID

Request body

change_at'immediate' | 'end_of_period'
idempotency_keystring
metadataobject
proration_behavior'create_prorations' | 'none' required
target_plan_idstring required

Response

OK

change_type'upgrade' | 'downgrade' | 'lateral'
effective_atstring date-time
is_scheduledboolean

IsScheduled is true when the change was deferred to the period end instead of being applied immediately.

metadataobject
schedule_idstring
scheduled_atstring date-time
warningsstring[]