Invoke AWS Step Functions from other services

You can configure several other services to invoke state machines. Based on the state machine's workflow type, you can invoke state machines asynchronously or synchronously. To invoke state machines synchronously, use the StartSyncExecution API call or Amazon API Gateway integration with Express Workflows. With asynchronous invocation, Step Functions pauses the workflow execution until a task token is returned. However, waiting for a task token does make the workflow synchronous.

Services that you can configure to invoke Step Functions include:

• AWS Lambda, using the StartExecution call.

• Amazon API Gateway

• Amazon EventBridge

• AWS CodePipeline

• AWS IoT Rules Engine

• AWS Step Functions

Step Functions invocations are governed by the StartExecution quota. For more information, see:

• Quotas