How can i change WebAPI Headers in the block section with Thunkable X ?
Currently, this is impossible to do.
There is a way to request the developpers to add this feature ?
This has already been suggested, but the developers can not fulfill all the requests that they receive. In the Thunkable X documentation you can see here what soon should appear.
Okay thanks, i will try to do this with an invisible web viewer and some JavaScript then…
Or JavaScript isn’t enabled too ?
Javascript in the Web Viewer component works through the data: protocol. Do you understand this or do you need an example?
If you don’t mind, i 'll like to have an exemple thanks ^^
Ok 
Basic example
Thanks i will work on this ^^
This shoud do the work pending the SetHeader block.
If i succeed to make this work i will edit the first post with the code, like that the other users will be able to benefit from it