The invention relates to a computer-implemented system and method for providing data services to a user via a best fit data matching application programming interface (API). The method may comprise exposing to the user, via the API, data services that are available electronically to the user. The data services are invoked with a query comprising a set of parameters. An automated query processing service is used to automatically analyze the parameters and match the parameters to a best electronic data source among a plurality of electronic data sources using a metadata store. The step of matching the parameters to the best electronic data source is based on a data quality metric, a date range and user permissions. The retrieved dataset, which is automatically presented to the user electronically via the API, can also be customized to include client-specific data elements.