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Use API Gateway to invoke a Lambda function

The following code examples show how to create an AWS Lambda function invoked by Amazon API Gateway.

Note
The source code for these examples is in the AWS Code Examples GitHub repository. Have feedback on a code example? Create an Issue in the code examples repo.

[ Java ]

SDK for Java 2.x
Shows how to create an AWS Lambda function by using the Lambda Java runtime API. This example invokes different AWS services to perform a specific use case. This example demonstrates how to create a Lambda function invoked by Amazon API Gateway that scans an Amazon DynamoDB table for work anniversaries and uses Amazon Simple Notification Service (Amazon SNS) to send a text message to your employees that congratulates them at their one year anniversary date.
For complete source code and instructions on how to set up and run, see the full example on GitHub.

Services used in this example

  • API Gateway
  • DynamoDB
  • Lambda
  • Amazon SNS

[ JavaScript ]

SDK for JavaScript V3
Shows how to create an AWS Lambda function by using the Lambda JavaScript runtime API. This example invokes different AWS services to perform a specific use case. This example demonstrates how to create a Lambda function invoked by Amazon API Gateway that scans an Amazon DynamoDB table for work anniversaries and uses Amazon Simple Notification Service (Amazon SNS) to send a text message to your employees that congratulates them at their one year anniversary date.
For complete source code and instructions on how to set up and run, see the full example on GitHub.
This example is also available in the AWS SDK for JavaScript v3 developer guide.

Services used in this example

  • API Gateway
  • DynamoDB
  • Lambda
  • Amazon SNS

[ Python ]

SDK for Python (Boto3)
This example shows how to create and use an Amazon API Gateway REST API that targets an AWS Lambda function. The Lambda handler demonstrates how to route based on HTTP methods; how to get data from the query string, header, and body; and how to return a JSON response.

  • Deploy a Lambda function.
  • Create an API Gateway REST API.
  • Create a REST resource that targets the Lambda function.
  • Grant permission to let API Gateway invoke the Lambda function.
  • Use the Requests package to send requests to the REST API.
  • Clean up all resources created during the demo. This example is best viewed on GitHub. For complete source code and instructions on how to set up and run, see the full example on GitHub.

Services used in this example

  • API Gateway
  • Lambda

For a complete list of AWS SDK developer guides and code examples, see Using Lambda with an AWS SDK. This topic also includes information about getting started and details about previous SDK versions.