Magento 2 – Where can I find the parameters from my external application sent to magento via rest api?

I’m making a request to magento 2 via REST API to “/rest/V1/carts/mine” from a external application.

I have set a breakpoint at the first line in index.php of magento 2 and inspect the variables and superglobals from xdebug, but I can’t find the parameters anywhere.

Where are they?