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{"openapi":"3.0.0","info":{"version":"2016-11-23","x-release":"v4","title":"AWS Step Functions","description":"<fullname>Step Functions</fullname> Step Functions is a service that lets you coordinate the components of distributed applications and microservices using visual workflows. You can use Step Functions to build applications from individual components, each of which performs a discrete function, or task, allowing you to scale and change applications quickly. Step Functions provides a console that helps visualize the components of your application as a series of steps. Step Functions automatically triggers and tracks each step, and retries steps when there are errors, so your application executes predictably and in the right order every time. Step Functions logs the state of each step, so you can quickly diagnose and debug any issues. Step Functions manages operations and underlying infrastructure to ensure your application is available at any scale. 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The following are some examples of qualified and unqualified state machine ARNs: <ul> <li> The following qualified state machine ARN refers to a Distributed Map state with a label <code>mapStateLabel</code> in a state machine named <code>myStateMachine</code>. <code>arn:partition:states:region:account-id:stateMachine:myStateMachine/mapStateLabel</code> <note> If you provide a qualified state machine ARN that refers to a Distributed Map state, the request fails with <code>ValidationException</code>. </note> </li> <li> The following unqualified state machine ARN refers to a state machine named <code>myStateMachine</code>. <code>arn:partition:states:region:account-id:stateMachine:myStateMachine</code> </li> </ul> This API action also deletes all <a href=\"https://docs.aws.amazon.com/step-functions/latest/dg/concepts-state-machine-version.html\">versions</a> and <a href=\"https://docs.aws.amazon.com/step-functions/latest/dg/concepts-state-machine-alias.html\">aliases</a> associated with a state machine. <note> For <code>EXPRESS</code> state machines, the deletion happens eventually (usually in less than a minute). 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The following are some examples of qualified and unqualified state machine ARNs: <ul> <li> The following qualified state machine ARN refers to a Distributed Map state with a label <code>mapStateLabel</code> in a state machine named <code>myStateMachine</code>. <code>arn:partition:states:region:account-id:stateMachine:myStateMachine/mapStateLabel</code> <note> If you provide a qualified state machine ARN that refers to a Distributed Map state, the request fails with <code>ValidationException</code>. </note> </li> <li> The following qualified state machine ARN refers to an alias named <code>PROD</code>. <code>arn:<partition>:states:<region>:<account-id>:stateMachine:<myStateMachine:PROD></code> <note> If you provide a qualified state machine ARN that refers to a version ARN or an alias ARN, the request starts execution for that version or alias. </note> </li> <li> The following unqualified state machine ARN refers to a state machine named <code>myStateMachine</code>. <code>arn:<partition>:states:<region>:<account-id>:stateMachine:<myStateMachine></code> </li> </ul> This API action returns the details for a state machine version if the <code>stateMachineArn</code> you specify is a state machine version ARN. <note> This operation is eventually consistent. 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Related operations: <ul> <li> <a>CreateStateMachineAlias</a> </li> <li> <a>ListStateMachineAliases</a> </li> <li> <a>UpdateStateMachineAlias</a> </li> <li> <a>DeleteStateMachineAlias</a> </li> </ul>","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/DescribeStateMachineAliasOutput"}}}},"480":{"description":"ValidationException","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ValidationException"}}}},"481":{"description":"InvalidArn","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidArn"}}}},"482":{"description":"ResourceNotFound","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ResourceNotFound"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/DescribeStateMachineAliasInput"}}}},"parameters":[{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.DescribeStateMachineAlias"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.DescribeStateMachineForExecution":{"post":{"operationId":"DescribeStateMachineForExecution","description":"Provides information about a state machine's definition, its execution role ARN, and configuration. If a Map Run dispatched the execution, this action returns the Map Run Amazon Resource Name (ARN) in the response. The state machine returned is the state machine associated with the Map Run. <note> This operation is eventually consistent. The results are best effort and may not reflect very recent updates and changes. </note> This API action is not supported by <code>EXPRESS</code> state machines.","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/DescribeStateMachineForExecutionOutput"}}}},"480":{"description":"ExecutionDoesNotExist","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExecutionDoesNotExist"}}}},"481":{"description":"InvalidArn","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidArn"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/DescribeStateMachineForExecutionInput"}}}},"parameters":[{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.DescribeStateMachineForExecution"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.GetActivityTask":{"post":{"operationId":"GetActivityTask","description":"Used by workers to retrieve a task (with the specified activity ARN) which has been scheduled for execution by a running state machine. This initiates a long poll, where the service holds the HTTP connection open and responds as soon as a task becomes available (i.e. an execution of a task of this type is needed.) The maximum time the service holds on to the request before responding is 60 seconds. If no task is available within 60 seconds, the poll returns a <code>taskToken</code> with a null string. <note> This API action isn't logged in CloudTrail. </note> <important> Workers should set their client side socket timeout to at least 65 seconds (5 seconds higher than the maximum time the service may hold the poll request). Polling with <code>GetActivityTask</code> can cause latency in some implementations. See <a href=\"https://docs.aws.amazon.com/step-functions/latest/dg/bp-activity-pollers.html\">Avoid Latency When Polling for Activity Tasks</a> in the Step Functions Developer Guide. </important>","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/GetActivityTaskOutput"}}}},"480":{"description":"ActivityDoesNotExist","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ActivityDoesNotExist"}}}},"481":{"description":"ActivityWorkerLimitExceeded","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ActivityWorkerLimitExceeded"}}}},"482":{"description":"InvalidArn","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidArn"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/GetActivityTaskInput"}}}},"parameters":[{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.GetActivityTask"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.GetExecutionHistory":{"post":{"operationId":"GetExecutionHistory","description":"Returns the history of the specified execution as a list of events. By default, the results are returned in ascending order of the <code>timeStamp</code> of the events. Use the <code>reverseOrder</code> parameter to get the latest events first. If <code>nextToken</code> is returned, there are more results available. The value of <code>nextToken</code> is a unique pagination token for each page. Make the call again using the returned token to retrieve the next page. Keep all other arguments unchanged. Each pagination token expires after 24 hours. Using an expired pagination token will return an HTTP 400 InvalidToken error. This API action is not supported by <code>EXPRESS</code> state machines.","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/GetExecutionHistoryOutput"}}}},"480":{"description":"ExecutionDoesNotExist","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExecutionDoesNotExist"}}}},"481":{"description":"InvalidArn","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidArn"}}}},"482":{"description":"InvalidToken","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidToken"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/GetExecutionHistoryInput"}}}},"parameters":[{"name":"maxResults","in":"query","schema":{"type":"string"},"description":"Pagination limit","required":false},{"name":"nextToken","in":"query","schema":{"type":"string"},"description":"Pagination token","required":false},{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.GetExecutionHistory"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.ListActivities":{"post":{"operationId":"ListActivities","description":"Lists the existing activities. If <code>nextToken</code> is returned, there are more results available. The value of <code>nextToken</code> is a unique pagination token for each page. Make the call again using the returned token to retrieve the next page. Keep all other arguments unchanged. Each pagination token expires after 24 hours. Using an expired pagination token will return an HTTP 400 InvalidToken error. <note> This operation is eventually consistent. The results are best effort and may not reflect very recent updates and changes. </note>","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListActivitiesOutput"}}}},"480":{"description":"InvalidToken","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidToken"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListActivitiesInput"}}}},"parameters":[{"name":"maxResults","in":"query","schema":{"type":"string"},"description":"Pagination limit","required":false},{"name":"nextToken","in":"query","schema":{"type":"string"},"description":"Pagination token","required":false},{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.ListActivities"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.ListExecutions":{"post":{"operationId":"ListExecutions","description":"Lists all executions of a state machine or a Map Run. You can list all executions related to a state machine by specifying a state machine Amazon Resource Name (ARN), or those related to a Map Run by specifying a Map Run ARN. You can also provide a state machine <a href=\"https://docs.aws.amazon.com/step-functions/latest/dg/concepts-state-machine-alias.html\">alias</a> ARN or <a href=\"https://docs.aws.amazon.com/step-functions/latest/dg/concepts-state-machine-version.html\">version</a> ARN to list the executions associated with a specific alias or version. Results are sorted by time, with the most recent execution first. If <code>nextToken</code> is returned, there are more results available. The value of <code>nextToken</code> is a unique pagination token for each page. Make the call again using the returned token to retrieve the next page. Keep all other arguments unchanged. Each pagination token expires after 24 hours. Using an expired pagination token will return an HTTP 400 InvalidToken error. <note> This operation is eventually consistent. The results are best effort and may not reflect very recent updates and changes. </note> This API action is not supported by <code>EXPRESS</code> state machines.","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListExecutionsOutput"}}}},"480":{"description":"InvalidArn","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidArn"}}}},"481":{"description":"InvalidToken","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidToken"}}}},"482":{"description":"StateMachineDoesNotExist","content":{"application/json":{"schema":{"$ref":"#/components/schemas/StateMachineDoesNotExist"}}}},"483":{"description":"StateMachineTypeNotSupported","content":{"application/json":{"schema":{"$ref":"#/components/schemas/StateMachineTypeNotSupported"}}}},"484":{"description":"ValidationException","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ValidationException"}}}},"485":{"description":"ResourceNotFound","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ResourceNotFound"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListExecutionsInput"}}}},"parameters":[{"name":"maxResults","in":"query","schema":{"type":"string"},"description":"Pagination limit","required":false},{"name":"nextToken","in":"query","schema":{"type":"string"},"description":"Pagination token","required":false},{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.ListExecutions"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.ListMapRuns":{"post":{"operationId":"ListMapRuns","description":"Lists all Map Runs that were started by a given state machine execution. Use this API action to obtain Map Run ARNs, and then call <code>DescribeMapRun</code> to obtain more information, if needed.","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListMapRunsOutput"}}}},"480":{"description":"ExecutionDoesNotExist","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExecutionDoesNotExist"}}}},"481":{"description":"InvalidArn","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidArn"}}}},"482":{"description":"InvalidToken","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidToken"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListMapRunsInput"}}}},"parameters":[{"name":"maxResults","in":"query","schema":{"type":"string"},"description":"Pagination limit","required":false},{"name":"nextToken","in":"query","schema":{"type":"string"},"description":"Pagination token","required":false},{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.ListMapRuns"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.ListStateMachineAliases":{"post":{"operationId":"ListStateMachineAliases","description":"Lists <a href=\"https://docs.aws.amazon.com/step-functions/latest/dg/concepts-state-machine-alias.html\">aliases</a> for a specified state machine ARN. Results are sorted by time, with the most recently created aliases listed first. To list aliases that reference a state machine <a href=\"https://docs.aws.amazon.com/step-functions/latest/dg/concepts-state-machine-version.html\">version</a>, you can specify the version ARN in the <code>stateMachineArn</code> parameter. If <code>nextToken</code> is returned, there are more results available. The value of <code>nextToken</code> is a unique pagination token for each page. Make the call again using the returned token to retrieve the next page. Keep all other arguments unchanged. Each pagination token expires after 24 hours. Using an expired pagination token will return an HTTP 400 InvalidToken error. Related operations: <ul> <li> <a>CreateStateMachineAlias</a> </li> <li> <a>DescribeStateMachineAlias</a> </li> <li> <a>UpdateStateMachineAlias</a> </li> <li> <a>DeleteStateMachineAlias</a> </li> </ul>","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListStateMachineAliasesOutput"}}}},"480":{"description":"InvalidArn","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidArn"}}}},"481":{"description":"InvalidToken","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidToken"}}}},"482":{"description":"ResourceNotFound","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ResourceNotFound"}}}},"483":{"description":"StateMachineDoesNotExist","content":{"application/json":{"schema":{"$ref":"#/components/schemas/StateMachineDoesNotExist"}}}},"484":{"description":"StateMachineDeleting","content":{"application/json":{"schema":{"$ref":"#/components/schemas/StateMachineDeleting"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListStateMachineAliasesInput"}}}},"parameters":[{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.ListStateMachineAliases"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.ListStateMachineVersions":{"post":{"operationId":"ListStateMachineVersions","description":"Lists <a href=\"https://docs.aws.amazon.com/step-functions/latest/dg/concepts-state-machine-version.html\">versions</a> for the specified state machine Amazon Resource Name (ARN). The results are sorted in descending order of the version creation time. If <code>nextToken</code> is returned, there are more results available. The value of <code>nextToken</code> is a unique pagination token for each page. Make the call again using the returned token to retrieve the next page. Keep all other arguments unchanged. Each pagination token expires after 24 hours. Using an expired pagination token will return an HTTP 400 InvalidToken error. Related operations: <ul> <li> <a>PublishStateMachineVersion</a> </li> <li> <a>DeleteStateMachineVersion</a> </li> </ul>","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListStateMachineVersionsOutput"}}}},"480":{"description":"ValidationException","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ValidationException"}}}},"481":{"description":"InvalidArn","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidArn"}}}},"482":{"description":"InvalidToken","content":{"application/json":{"schema":{"$ref":"#/components/schemas/InvalidToken"}}}}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ListStateMachineVersionsInput"}}}},"parameters":[{"name":"X-Amz-Target","in":"header","required":true,"schema":{"type":"string","enum":["AWSStepFunctions.ListStateMachineVersions"]}}]},"parameters":[{"$ref":"#/components/parameters/X-Amz-Content-Sha256"},{"$ref":"#/components/parameters/X-Amz-Date"},{"$ref":"#/components/parameters/X-Amz-Algorithm"},{"$ref":"#/components/parameters/X-Amz-Credential"},{"$ref":"#/components/parameters/X-Amz-Security-Token"},{"$ref":"#/components/parameters/X-Amz-Signature"},{"$ref":"#/components/parameters/X-Amz-SignedHeaders"}]},"/#X-Amz-Target=AWSStepFunctions.ListStateMachines":{"post":{"operationId":"ListStateMachines","description":"Lists the existing state machines. If <code>nextToken</code> is returned, there are more results available. The value of <code>nextToken</code> is a unique pagination token for each page