Learn how to implement, test, and monitor X-Frame-Options headers to protect websites from clickjacking and framing attacks.

APIs allow applications to communicate with each other. To control and secure access, APIs often require a method to identify the client making the request....

The Vary header is an HTTP response header that tells caches which request headers affect the response. It ensures that different versions of a resource are...

Learn what a User-Agent header is, its key components, how it affects browsers and devices, and techniques to test user-agent headers.

Learn what X XSS protection is, how it works, different X XSS attack types, how to integrate it, and advanced strategies for web security.

Learn what X-Forwarded-For is, how it works, its impact on web security, logging, and best practices for accurate client IP tracking.

Learn how X-Content-Type-Options improves web security, its purpose, and best practices for implementation and protection.

Learn when to use GraphQL, explore its benefits, key use cases, limitations, and how to migrate to GraphQL from REST.

Learn what a request URL is, its structure, and why it is important for API testing, debugging, and application reliability.

Learn what network delay requests are, why they matter, and how to test APIs and applications using Requestly for reliable performance.

Learn how to mock APIs with Playwright and explore advanced techniques, including conditional mocking, HAR files, and dynamic responses.