Introduction
Modern technology organizations frequently use service-oriented backend architecture, which necessitates a powerful API to accommodate expanding business requirements. As a result, thorough API testing is crucial to ensuring quick development without sacrificing code quality.

By sending requests to the web server and receiving responses, Postman is an application for testing APIs.
It verifies the answer and enables users to configure all the headers and cookies the API requires.
An API testing tool is called Postman. It is an HTTP client that examines HTTP requests using a graphical user interface, allowing us to get various results that must then be verified. When it comes to using APIs, it is quite practical. After entering and saving them, you can use them often without having to recall the precise endpoint, headers, API credentials, etc.
Postman offers a wide range of advantages:
- Simple setup: Download the API and start trying it right away.
- Little to no API experience necessary: Postman UI makes using an API simple and intuitive.
- Create, publish, and share your collection with team members to work collaboratively! Postman test suites can be shared and improved by others, just like open-source projects.
API governance
The act of applying a predetermined set of guidelines uniformly during the development process testing and design phases is known as API governance. Applying standards consistently facilitate collaboration throughout the whole API development lifecycle and aids in the creation of high-quality APIs.
The API governance tools in Postman provide direction for designing and testing APIs. Postman lets you develop stronger, more secure APIs that adhere to industry best practices by pointing out potential inconsistencies or weak points and suggesting potential solutions or enhancements.

The following phases of API development are where Postman applies API governance rules:
- API definition governance rules are applied by Postman and it displays alerts regarding the format and security posture of your definition.
- API testing - Postman analyses your API requests in accordance with governance guidelines and displays alerts about potential security risks.