Feature Experimentation API

Hybrid Experimentation

There are use cases where it makes sense to combine client-side (JavaScript and CSS based, among others) and server-side (API) experiments.
On this page

Using client-side and API based experimentation together

Basically, the only relevant thing is the correct assignment of the user to the experiments/features and the specific variants.
This is done client-side via the cookie ablyft_exps.
When using the Feature Experimentation API, this exact value is represented by user.bucketing.

As long as these values are in sync, correct tracking and user experience is applied.