title: Amazon Ec2 api call though Postman Rest client
body: <p>I have tried to use postman rest client to access amazon web service to get availability zone as "<a href="https://ec2.amazonaws.com/?Action=DescribeAvailabilityZones" rel="nofollow">https://ec2.amazonaws.com/?Action=DescribeAvailabilityZones</a>" get type , I am selecting authorization as AWSSignature, but am getting Http Status code as 401 unauthorized status in response. I don't know what should i give in service name while selecting AWSSignature ? I tried to give service name as ec2 and aws. Can any one help on this ?</p>