aws lambda is a serverless compute service that runs code in response to events and automatically manages underlying resources. To monitor an aws lambda function with new relic, you can use either serverless monitoring or synthetics. Serverless monitoring allows you to see performance data for every invocation, including detailed duration and exceptions. Synthetics enable you to script tests to monitor how your lambda function responds to external events. before deploying your code, create a lambda function using python and fastapi, then deploy it to aws lambda using the serverless cli. To instrument your lambda function with new relic, install the serverless-newrelic-lambda-layers plugin and configure your serverless.yaml file. You can also view your lambda function performance and health in new relic, including error handling and stack traces. Additionally, you can use scripted api tests to verify that your lambda function is returning valid data. With this setup, you'll be able to monitor and optimize the performance of your aws lambda functions using new relic.