Here is a list of resources if you want to learn more about the REST API:

• https://jwt.io/
• https://tools.ietf.org/html/rfc7519

• Hands-On RESTful API Design Patterns and Best Practices, by Harihara Subramanian and Pethuru Raj by Packt Publishing

• Hands-On RESTful Python Web Services – Second Edition, by Gaston C. Hillar by Packt Publishing

• Beginning API Development with Node.js, by Anthony Nandaa by Packt Publishing