You can call a funtion from url using http.route

for example call a function from url www.domain.com/web/my/home

@http.route(['/my/home'], type='http', auth="public", website=True)
def your_function(self, **kw):
     # your code

or if you want to call a function defined inside a model use this inside your function

request.env['your.model'].function_name()