HTTP binding use bearer token

I want to use the http binding to do some post requests, but I need a bearer token, which I get from another post request.
How can I use the bearer token in a http thing which I grabbed in another thing?
I was already thinking to grab the bearer token in the http thing, and use a linked item in a rule to execute my post command via sendHttpPostRequest. But if everything can be done via the http binding would be great