We started this chapter with the intention of building an XML-RPC based API for web applications. Then, we discussed the usage of existing API functions while building an API client from scratch.
Complex applications will always exceed the limits of an existing API, hence, we looked at the possibility of creating a custom API. User authentication and API tokens were necessary for preventing unnecessary API access and measured the API usage. Finally, we looked at the possibility of creating the API documentation through another API function. Having completed the API creation techniques, you should now be able to develop complex APIs to suit any kind of web application.
In the final chapter, we are going to integrate all of the individual plugins created throughout this book to illustrate the techniques for structuring large web applications, while looking at some of the uncompleted areas of portfolio management application. So be prepared for an exciting finish to this book.