Hello, I had been searching for the answer to this question for very long but did not find any. People suggest which brokers offer free API. I am looking for the best API through your personal experience. Zerodha API is just too costly for me. I tried Finvasia but it is slow and they make frequent changes to the API functions which makes my python program fail. Can you please suggest which broker provides the best API - stable, fast and that does not change very often. It can be a discount or a full service broker. Thanks in advance.