Our Google add-on store uses PayPal Subscriptions with Digital Goods to process recurring payments and the invoices are sent to customers through Document Studio . The cloud function was previously using the official PayPal SDK forNode.jsbut it has been recently deprecated and no longer supports the new PayPal subscriptions API endpoints. Migrating from the PayPal Node SDK to your own solution is relatively simple and involves two steps: 1. Verify PayPal Subscription A successful request returns the HTTP 200 OK status code and a JSON response body.