bug types we faced api testing

Issues observed when performing API testing are
•	Stress, performance, and security issues
•	Duplicate or missing functionality
•	Reliability issues
•	Improper messaging
•	Incompatible error handling mechanism
•	Multi-threaded issues

•	Fails to handle error conditions gracefully
•	Unused flags
•	Missing or duplicate functionality
•	Reliability Issues. Difficulty in connecting and getting a response 
from API
•	Security Issues
•	Multi-threading issues
•	Performance Issues. API response time is very high
•	Improper errors/warning to a caller
•	Incorrect handling of valid argument values
•	Response Data is not structured correctly (JSON or XML