Castor CDMS has a public API that can be used to push and pull data from Castor studies. All API documentation can be found at data.castoredc.com/api. 

Please make sure you use the right URL, depending on where your study is located:

You can also find the right URL in your address bar, if you have opened your study in Castor EDC.

You can find further information about API client credentials in the article: Castor EDC/CDMS Application Programming Interface (API)

Please consider the API Developer policy which is applicable to Castor CDMS API.