In this chapter, you learned about building API Gateway APIs with mock integration, Lambda integration (AWS integration), and Lambda proxy integration (AWS_PROXY integration). You can also do HTTP and HTTP proxy integrations, and you can integrate API Gateway with other AWS services. Try to experiment with other integrations. 

There is more to learn about Lambda and API Gateway in the context of Serverless programming, in areas such as security, hosting, deployment, scalability, performance, and so on. We will focus on some of these in the upcoming chapters.