Abstract: A system and a method for automating performance detection of one or more application programming interfaces (APIs) is provided. The present invention provides for retrieving one or more test cases and associated test data as per respective test case ID's and generate one or more test requests by applying a data enrichment technique. Further, the present invention provides for executing one or more generated test requests on an API under test, analyze a response received from the API under test, perform response validation, detect any defects in the API based on the received response, and generate a detailed report of the executed test request. Furthermore, the present invention provides a visual interface for selecting test cases, creating test cases, editing test cases, editing test requests, display execution of test requests and test reports.