**Use Modified Condition/Decision Coverage (MC/DC) to reduce test cases**: MC/DC is a software testing technique that can help reduce test cases and ensure code coverage, making API testing more efficient.
**Plan what to test**: Identify the key endpoints and functionalities to test, and prioritize them based on business requirements and risk assessment.
**Use exploratory testing to uncover unknown issues**: Manual exploratory testing can help identify issues that automation may miss, such as usability and performance issues.
**Estimate testing effort as a percentage of development time**: Allocate 25% of development time for analysis, 50% for design, development, and unit testing, and 25% for testing.
**Use API documentation to identify test scenarios**: API documentation can provide valuable insights into the expected behavior of the API, helping identify test scenarios and edge cases.
**Use mocking and patching to isolate dependencies**: Mocking and patching can help isolate dependencies and reduce the complexity of API testing.
**Test for security gaps**: Identify potential security gaps, such as authentication and authorization issues, data encryption, and input validation.
**Use tools like JMeter for performance testing**: JMeter can help simulate a large number of requests to test API performance and scalability.
**Write test cases based on API documentation**: Use API documentation to write test cases that cover different scenarios, edge cases, and error handling.
**Test API documentation for accuracy and completeness**: Verify that API documentation accurately reflects the API's behavior and is complete, up-to-date, and easy to understand.
**Use frameworks like Postman for API testing**: Postman provides a comprehensive set of tools for API testing, including request building, response validation, and automation.
**Use automation to handle regressions and data-driven testing**: Automation can help reduce the time and effort required for API testing, especially for regressions and data-driven testing.
**Test for API response structure and data validation**: Verify that API responses are well-structured and conform to expected data formats and validation rules.
**Use testing environments and API keys**: Set up test environments and obtain API keys to test APIs in a controlled and secure environment.
**Use API testing tools and frameworks to streamline testing**: Utilize API testing tools and frameworks, such as API Testing Tools and Framework, to streamline testing and reduce the time and effort required.