You wrote this AWS CLI command to subscribe an HTTP endpoint but get an error:

medium📝 Debug Q14 of 15

AWS - SNS and SQS

aws sns subscribe --topic-arn arn:aws:sns:us-east-1:123456789012:MyTopic --protocol http --notification-endpoint http://example.com/notify

What is the most likely cause of the error?

AThe HTTP endpoint URL must use HTTPS, not HTTP

BThe topic ARN is invalid

CThe protocol should be 'https' instead of 'http'

DThe notification endpoint URL is missing a trailing slash

Step-by-Step Solution

Solution:

Step 1: Check protocol requirements for HTTP endpoints
AWS SNS requires HTTP endpoints to use HTTPS for security; HTTP URLs cause errors.
Step 2: Validate the given URL and protocol
The URL uses 'http://' which is not allowed; it must be 'https://'.
Final Answer:
The HTTP endpoint URL must use HTTPS, not HTTP -> Option A
Quick Check:
HTTP endpoints require HTTPS URL [OK]

Quick Trick: Use HTTPS URLs for HTTP/HTTPS SNS subscriptions [OK]

Common Mistakes:

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