Yodlee’s Expense and Income APIs return aggregated debit and credit transaction data grouped by either merchants or categories for a given time duration. The API response includes summary data such as total, maximum, minimum, average, etc., for each category/merchant along with transaction-level details (optional).
Using the Expense and Income APIs, application developers can build solutions that answer user questions such as "how much did I spend on Amazon last month?" or "have I spent more than $XYZ at Starbucks in the last 3 months?"
The utilizedCategories and utilizedMerchant task APIs retrieve the list of categories and merchants, respectively, which are applied to a user’s aggregated transactions. These values can be used in the Expense and Income APIs to get results for a specific category or merchant.