This article is written from the perspective of a backend developer and focuses on the top five security measures that can be implemented to protect a web API. The author emphasizes the importance of securing APIs, as they are often targeted by attackers due to their valuable data. The article covers the use of authentication and access control, data encryption, input validation, output encoding, and rate limiting as effective measures to secure web APIs. The author provides practical tips and examples for each security measure, making it a helpful resource for developers looking to improve the security of their web APIs.