Lunar.dev serves as a consumption gateway that enhances API traffic management from AWS Lambda functions by providing visibility, alerting, and proactive remediation for external API errors. AWS Lambda, a Function as a Service (FaaS), enables developers to execute code without the need for server management, making it a popular choice for integrating external systems. However, these integrations can affect Lambda's reliability, speed, and cost. Lunar.dev addresses these challenges by intercepting unnecessary requests, leveraging caching, and reducing latency, ultimately optimizing API consumption and lowering infrastructure costs. The installation process for Lunar.dev is straightforward, and its use with Lambda functions can lead to reduced average response times and minimized compute time, providing significant advantages in serverless architectures.