API ReferencePublic APIChange a subscription planChange a subscription plan POST /v1/subscriptions/:id/change-plan Change a subscription plan Request Responses200401403404409422Plan changedAuthentication failedInsufficient permissionResource not foundIdempotency or state conflictValidation errorDid this page unblock the next step?ResolvedNeeds improvementFeedback stays inside the docs flow and should never include customer or card data.