Designing APIs for use over the web is a key part of most web development projects these days. Knowing the best way to design them with longevity, testability and reliability in mind is important. By explaining API Design steps and API Design approaches, the student will be familiar with all these concepts in a practical way. Then the student will be familiar with different API styles, and obtain a deeper level of knowledge about REST and its key difference and advantageous over the other styles. Finally, the student will understand security and performance concerns.