6. Create an API in AWS API Gateway

Create an API to talk to your Lambda function through API Calls

Follow below steps to Create a an API

• Login into your AWS Management Console.
• Make sure your in Canada (Central) ca-central-1 region
• Go to Services , and open API Gateway under Networking & Content Delivery section.
• Go to REST API and Click on Build
  • Select New API radio button.
  • Enter postAPI as API name (You can give any name)
  • Make sure your Endpoint Type is regional
  • Click on Create API
• Now Click on Actions and select Create a Resource
  • Keep Configure as proxy reosource as Unchecked.
  • Enter postdata as Resource name
  • Check on Enable API Gateway CORS and click on Create Resource.
  • Select OPTIONS method from newly appeared option under postdata resource.
  • Click on Integration request.
  • Now keep Lambda Function as integration type
  • Mark as checked to Use Lambda Proxy integration option.
  • Keep Lambda region as ca-central-1
  • Enter postDynamo as Lambda Function
  • Click on Save

  If you've gave any different name while creating a Lambda function then you should give that specific name

  • Click OK on appeared INFO popup.
• Now you've created a API to do communication with you Lambda function. But we still need to deploy it. So
  • To deploy this API click on Actions and select Deploy API
  • Go to Deployment Stage and select [New Stage].
  • Enter production as a stage name.
  • Feel free to add stage description and deployment description of your choice.
  • Click on Deploy.
• Now you've deployed the API in production stage.
  • To integrate it with our use-case we need Invoke URL of specific Resource which is postdata in our case.
  • So Click on drop down symbol beside production stage.
  • Select OPTIONS method and look for Invoke URL.

MOST IMP: Now copy your Invoke URL and paste it in Notes.

You've successfully created and deployed an API.