What are the common bugs in API testing?

API testing involves testing application programming interfaces (APIs) to ensure that they function correctly and provide the expected results.

Here are some common bugs that can occur during API testing:

Invalid Inputs: If an API accepts invalid inputs, it can lead to unexpected behavior or incorrect results. This can be caused by missing or invalid data, incorrect data types, or incorrect data formats.

Incorrect Outputs: If an API returns incorrect outputs, it can lead to unexpected behavior or incorrect results. This can be caused by incorrect calculations, missing data, or incorrect data formats.

Inconsistent Outputs: If an API returns inconsistent outputs, it can be difficult to predict the behavior of the system. This can be caused by race conditions, synchronization issues, or system performance issues.

Security Vulnerabilities: APIs can be vulnerable to security threats, such as injection attacks, cross-site scripting (XSS), and broken authentication and session management. These vulnerabilities can lead to data theft or system compromise.

Performance Issues: APIs can have performance issues, such as slow response times or high resource utilization. These issues can impact the performance and scalability of the system.

Integration Issues: APIs can have integration issues with other systems or components, such as data consistency issues or data formatting issues. These issues can lead to incorrect data being passed between systems or components.

Documentation Issues: If the API documentation is incorrect or incomplete, it can lead to misunderstandings or misinterpretations of the API behavior. This can lead to incorrect test cases or incorrect API usage.

These are just a few examples of the common bugs that can occur during API testing. The actual bugs will depend on the specific requirements and goals of the project. It is important to have a well-planned API testing strategy to ensure that the API meets the desired quality standards and delivers the expected business value