What is the API Rate Limit? QuickBooks Commerce API provides a rate limit of 300 requests per 300 seconds. Related articles QuickBooks Commerce's API How do I increase my Order Limit? QBO Error: A business validation error has occurred while processing your request: Business Validation Error: Transactions can have only one foreign currency at a time. How do I manage my returns with WooCommerce and QuickBooks Commerce? TradeGecko is now QuickBooks Commerce