creatin REST service in flow with http post

Hi
I have a flow which gets via http post data and should route them to service provider.
I need to read all data in flow, the content and the URL. The URL post contains the apikey, the content is jason:
URL http://mydomain.us/v1/create_user?apikey=1234-5678-1234-5678
in pipeline I see all transformation headers info but not the apikey=1234-5678-1234-5678
example:
/rest/test.shipment/v1/create_user
HTTP

Does anybody know the solution?
Thank you
Peter

The issue resolved after recreation of flow however the reason was not clear