I ask the question and I have to admit that I'm a bit confused on the way to be precise to ask the question... Sorry for that!
Anyhow, I'm using from time to time SageMath on a local machine. I have seen that SageMath is also offering access from a server Sage Cell Server. If I understand well this is a way to access SageMath interpreter from a web browser.
Note: I also asked the question on StackOverflow