I am working on an api and would like to get some more context behinds authenticating into the api - so I am trying to get a list out of available flavors 1 and servers to start off with. I am able to get a token that I can interact with against keystone which shows up as https://mydevstackurl/identity/ however when I try and run a simple curl against my compute as follows: 

curl   -H "X-Auth-Token: $OS_TOKEN" -s https://http://mydevstackurl/compute/api/v2.1/servers

I got no response back from curl - no 200 ,no 30x no 4xx nothing. 

Can anyone help to get me started ? The documents seem to be pretty detailed - but the methods provided don’t seem to work either in the tutorial: for example: 

curl -s -H "X-Auth-Token: $OS_TOKEN" \
  $OS_COMPUTE_API/flavors \
  | python -m json.tool

Only returns: 

Thanks