This is a sample program to generate URL with CloudStack API.
-u command string -a apikey -s secretkey
./api.py -u "command=listVirtualMachines&projectid=2" -a l8TBjSEdlHKUQvTWgNx6aQLLiWWjsC_tJfKK2_p9H6PV64iBpNM5bRXLP25YiVahsiUXK3D3meLhwJ0IcEwqyw -s Ta-KV5ayshFk0bJ4qsrD20JQSfRS1kkr6armUSZFmbMrx7aIupPPo1uv0nwUfx7QYvlhBsrxPCBHtE_B7yaOzA