I’m developing a Shopify app (currently under review) and implementing the Billing API for recurring charges.
When I test on development stores, I get a 403 Forbidden error when calling POST /admin/api/2024-01/recurring_application_charges.json - even with test: true in the request body.
The access token is valid (other API calls work fine).
Questions:
Is the Billing API restricted on development stores?
Is there a way to test billing while my app is under review and can’t be installed on production stores?