Fastapia predated the concept of type innitations y actually, like a lot of the things in fastapia were learnt from flask. And those whore my fairy tools like apuntil i built facipia to be able to have like that functionality that they provided. That is the same for all your functions. In faste pi, you can actually get the request and get the data by yourself,. if you want usalso is actually also available. But the main point of diraction was not getting a request object, but declaring the parimeters in the function. Those barometers will be extracted, validated and everything from the request and also documented.