Is there a way to assign a Static IP to a AWS Lambda without VPC?

Question

I am looking to assign a static IP to my Lambda which is being invoked via the API gateway. This is required because, the downstream system that i invoke from this lambda accept

Answer 1

You can't assign a public/static IP to any Lambda function.

Your only good option is to deploy into a VPC with an Internet Gateway and configure routing from the Lambda's subnet through a NAT which has an Elastic IP. Then your target host can whitelist the Elastic IP.

Also see:

• Public IP address for AWS API Gateway & Lambda (no VPC) - Stack Overflow
• AWS Lambda functions with a static IP – Matthew Leak – Medium