OpenStack cinder api - Malformed request url
Ok, the issue resolved, after running a debug from openstack client using -vvv so this trick leads to what API call performed to list volumes
the issue was that token generated was from admin project, and I put in volumes API another project, the error message was misleading ! changed api call to admin project and it was successfull
to list all volumes for all tenants use http://:8776/v3//volumes/detail?all_tenants=True