Accessing API function from Lambda java container through API gateway results at 403 forbidden error

Hi,

The API Gateway APIs can return 403 responses for multiple reasons, so I recommend that you take a look at the following Knowledge Center post to identify what's causing the error, and apply the most appropriate solution.

Do you have authorizers? Gave you checked resource policies?

If you do have check this https://repost.aws/knowledge-center/api-gateway-403-error-lambda-authorizer