In modern cloud-native environments, APIs serve as the backbone of communication between distributed services. Ensuring their reliability, security, and performance is critical to maintaining application stability and delivering seamless user experiences. This session explores how Postman, a popular API platform, can be effectively leveraged for automated API testing and monitoring within cloud-native architectures. Attendees will learn how to design robust test collections, automate execution using Newman in CI/CD pipelines, and integrate with platforms like Kubernetes, GitHub Actions, and Jenkins for continuous validation. The session also covers best practices for testing authentication flows (OAuth2, API keys), schema validation, and performance benchmarks. Furthermore, it demonstrates how Postman’s monitoring capabilities can be extended using cloud-native observability tools such as AWS CloudWatch and Azure Monitor to track API health and uptime. By combining Postman with automation and cloud tooling, developers and DevOps teams can build resilient systems, catch issues early, and reduce the risk of production failures. Whether you're managing microservices or modernizing legacy systems, this talk provides practical insights and live examples to enhance your API lifecycle management. Ideal for engineers, testers, and architects looking to bridge the gap between API testing and cloud operations with scalable and automated solutions.