StartFlow - AmazonAppFlow


Activates an existing flow. For on-demand flows, this operation runs the flow immediately. For schedule and event-triggered flows, this operation activates the flow.

Request Syntax

POST /start-flow HTTP/1.1 Content-type: application/json { "clientToken": "string", "flowName": "string" }

URI Request Parameters

The request does not use any URI parameters.

Request Body

The request accepts the following data in JSON format.


The clientToken parameter is an idempotency token. It ensures that your StartFlow request completes only once. You choose the value to pass. For example, if you don't receive a response from your request, you can safely retry the request with the same clientToken parameter value.

If you omit a clientToken value, the AWS SDK that you are using inserts a value for you. This way, the SDK can safely retry requests multiple times after a network error. You must provide your own value for other use cases.

If you specify input parameters that differ from your first request, an error occurs for flows that run on a schedule or based on an event. However, the error doesn't occur for flows that run on demand. You set the conditions that initiate your flow for the triggerConfig parameter.

If you use a different value for clientToken, Amazon AppFlow considers it a new call to StartFlow. The token is active for 8 hours.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Pattern: [ -~]+

Required: No


The specified name of the flow. Spaces are not allowed. Use underscores (_) or hyphens (-) only.

Type: String

Length Constraints: Maximum length of 256.

Pattern: [a-zA-Z0-9][\w!@#.-]+

Required: Yes

Response Syntax

HTTP/1.1 200 Content-type: application/json { "executionId": "string", "flowArn": "string", "flowStatus": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


Returns the internal execution ID of an on-demand flow when the flow is started. For scheduled or event-triggered flows, this value is null.

Type: String

Length Constraints: Maximum length of 256.

Pattern: \S+


The flow's Amazon Resource Name (ARN).

Type: String

Length Constraints: Maximum length of 512.

Pattern: arn:aws:appflow:.*:[0-9]+:.*


Indicates the current status of the flow.

Type: String

Valid Values: Active | Deprecated | Deleted | Draft | Errored | Suspended


For information about the errors that are common to all actions, see Common Errors.


There was a conflict when processing the request (for example, a flow with the given name already exists within the account. Check for conflicting resource names and try again.

HTTP Status Code: 409


An internal service error occurred during the processing of your request. Try again later.

HTTP Status Code: 500


The resource specified in the request (such as the source or destination connector profile) is not found.

HTTP Status Code: 404


The request would cause a service quota (such as the number of flows) to be exceeded.

HTTP Status Code: 402


StartFlow example

This example shows a sample request and response for the StartFlow API.

Sample Request

{ "flowName": "name" }

Sample Response

{ "flowArn": "arn:aws:appflow:region:<AccountId>:flow/test_flow_ondemand_1", "flowStatus": "Active" }

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: