Implementing CryptAPI it's easy and simple. We provide documentation and libraries on many programming languages which may help you in the process.
You can break down the implementation to 3 easy steps:
1 - You'll need to handle the API requests to our various endpoints. You'll need to create the request, but you may need to convert the payment value to cryptocurrency you want to receive the requests on (e. g you have a store which currency is EUR and you may want to receive payments in BTC). For that you'll need to write a library (or use one that we provide) that can handle all those different requests
2 - You need integrate our API logic in your platform, together with other payment methods you may have. For example, you may create a database table for CryptAPI payments where you can store useful data
3 - Create an endpoint in your platform where our API can send the callbacks. This endpoint should be able to process the callback information and should be the one you provide our API to when requesting an address.