Brave New Coin REST API exposes the following endpoints:

• GWA/MWA: Data from intraday API's is limited to a 200 day trailing window and refreshed every 30 seconds from June 1st, 2019.
  
• OHLCV: OHLCV API's can provide the full historic dataset.
  
• Market Cap: Latest ranking within the last 5 minutes.
  
• XchangeFeed: Standardized exchange market tickers updated every 30 seconds.
  

There are currently no rate limits on API requests, but pagination is enforced on API responses to limit the payload of any one call. See Pagination

A sample Java API client project using the BNC REST API is available on Github :

• Java
  

Please feel free to create issues and/or pull requests on Github if you would like to contribute to these projects.

You can download the OpenAPI specification and generate your own clients if the language which you are working with is not found in the list. The download link can be found at the top of this page; and is available on github