You can read our Terms and Conditions for API usage here.
Can I place BO/CO through FYERS API?
Can I place Basket Orders through FYERS API?
Does FYERS provide any support in setting up my Trading System or Algorithm for Individuals?
Does FYERS provide free trial access to APIs for developers?
Do I need to pay for Datafeeds?
Does FYERS charge any subscription fees for Trading API?