To get your Lifetime Free API key signup here
This section explains the basic working of Cricket Data API - it is not language specific. This can guide you in implementing the API for your favourite programming language. We also have quite a few Code Samples in different languages, - furthermore if you'd like to contribute please do reach out to us! The Basic Data APIs may be found here.
Fantasy API are only available under the Paid plan, and using under the 'Lifetime Free' plan has a usage penalty. You can purchase a subscription to use these API.