This chapter concludes the Elasticsearch APIs. Being a very vast topic, not all of the APIs can be covered, but we have got the gist of how these APIs work and help us to manage the Elasticsearch cluster, nodes, and indices or even make a search for documents. When you are working with Kibana, the same things can be done using the Console. There are many REST-based clients developed for Elasticsearch for numerous languages and platforms that use http protocol and we have been learning that since Chapter 2, Stepping into Elasticsearch. This chapter also covered the other side of the story - using Transport Client with the help of the Java API.
The next chapter is going to focus on the customization of Elastic Stack using plugins. Plugins give us a good amount of control on the functionalities and we get a liberty to implement what is not present or mend what is present to make it work for us. We will be learning the way we can create new plugins and customize the stack.