Historical tick data has become increasingly important for research, back-testing of strategies and verification of internal data. However, collecting and storing such large data sets requires substantial infrastructure and resources. Nasdaq Data-on-Demand is designed to eliminate the infrastructure and resourcing obstacles by providing a high quality, reliable source of Level 1 data.
Nasdaq Data-On-Demand provides access to consolidated Best Bid and Best Offer, and Last Sale information from the U.S. equity markets. It is available on a T+1 basis. Data can be accessed using an API. It is also available in plain text files for easy integration and analysis in programs such as Microsoft Excel
Reference the API Documentation