 <p>Yes, you can. The Amazon SNS API is accessible and works using an HTTP protocol. All SDKs are just utility tools to make this communication easier.</p> <p>As you can see from the <a href="http://docs.aws.amazon.com/sns/latest/dg/SendMessageToHttp.html" rel="nofollow">AWS SNS API docs here</a>, it is a matter of sending a <code>POST</code> request with correctly formulated HTTP Headers and body.</p> <pre><code>POST / HTTP/1.1 x-amz-sns-message-type: Notification x-amz-sns-message-id: da41e39f-ea4d-435a-b922-c6aae3915ebe x-amz-sns-topic-arn: arn:aws:sns:us-west-2:123456789012:MyTopic x-amz-sns-subscription-arn: arn:aws:sns:us-west-2:123456789012:MyTopic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55 Content-Length: 761 Content-Type: text/plain; charset=UTF-8 Host: ec2-50-17-44-49.compute-1.amazonaws.com Connection: Keep-Alive User-Agent: Amazon Simple Notification Service Agent { "Type" : "Notification", "MessageId" : "da41e39f-ea4d-435a-b922-c6aae3915ebe", "TopicArn" : "arn:aws:sns:us-west-2:123456789012:MyTopic", "Subject" : "test", "Message" : "test message", "Timestamp" : "2012-04-25T21:49:25.719Z", "SignatureVersion" : "1", "Signature" : "EXAMPLElDMXvB8r9R83tGoNn0ecwd5UjllzsvSvbItzfaMpN2nk5HVSw7XnOn/49IkxDKz8YrlH2qJXj2iZB0Zo2O71c4qQk1fMUDi3LGpij7RCW7AW9vYYsSqIKRnFS94ilu7NFhUzLiieYr4BKHpdTmdD6c0esKEYBpabxDSc=", "SigningCertURL" : "https://sns.us-west-2.amazonaws.com/SimpleNotificationService-f3ecfb7224c7233fe7bb5f59f96de52f.pem", "UnsubscribeURL" : "https://sns.us-west-2.amazonaws.com/?Action=Unsubscribe&amp;SubscriptionArn=arn:aws:sns:us-west-2:123456789012:MyTopic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55" } </code></pre> <p>You may learn how to sign and build correct requests in their docs (link provided above). So, you don't have to use SDK, and make your own requests. But, I would suggest using the SDK, since it addresses many security issues for you.</p>