AWS Lambda functions are critical parts of serverless applications and require instant visibility into which service triggered a function invocation to build observability. New Relic Serverless for AWS Lambda has released event sources for Node.js and Python, providing context about the AWS service triggering each invocation, including metrics such as duration, errors, and external calls. The feature allows developers to instantly identify issues caused by upstream or connecting services, making it easier to debug serverless applications. Additionally, New Relic Serverless now offers logs in context, a Facet Builder for custom insights, and bulk CLI installer to simplify monitoring and troubleshooting of AWS Lambda functions.