Hello odoo community

I'm fairly new to odoo. I have an odoo application as my backend and a frontend web-app with just basic html,css and js.

Now i want to send a request to the /web/webclient/version_info endpoint which is created by odoo itself so i dont want to change anything on this endpoint. But no matter how i sent the request it always has issues with cors or the headers are not set correctly or the content which im sending is not the correct type (i know it is). I know setting cors='*' would solve the problem but i dont want to do that. I also tried using jsonp but that doesnt let me set a custom header and i also need to set one.

So my question is has anybody experienced this before and could maybe post a sample on how they are sending their request from their frontend web-app to this odoo endpoint?

Here the endpoint im talking about in the webclient.py file

@http.route('/web/webclient/version_info', type='json', auth="none")
def version_info(self):
    return odoo.service.common.exp_version()