title: Is StartExecution api for AWS Step Function asynchronous?
body: <p>I have a use case where I want to start a step function asynchronously from one of my existing lambda function. For this, I am using the StartExecution API. (<a href="https://docs.aws.amazon.com/step-functions/latest/apireference/API_StartExecution.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/step-functions/latest/apireference/API_StartExecution.html</a>)</p>
  
  <p>so does this API starts the step function asynchronously. if so, can someone please point me to the right documentation, where this is mentioned.</p>