If the field is marked as required, you won't be able to bypass it easily.

If you would like a field to be required through the interface but not at the server level, the easiest way is to make it required=False in the field definition, but put required="1" in the view definition. This means anyone entering a record on the page is forced to add it, but through the api you don't need it.

However, if you open a record that was created through the api, you won't be able to save any changes until the field is set.