Minimum Asynchronous Requirement

To make an asynchronous API call, identify it as asynchronous using one of these wrappers.

C# Example

CreateOptions co = new CreateOptions();
co.RequestType = RequestType.Asynchronous;
co.RequestTypeSpecified = true;
CreateResult[] results = integrationFramework.Create(co, new APIObject[] { sub }, out requestID, out status);

SOAP Envelope

<soap:Body>
    <CreateRequest xmlns="http://exacttarget.com/wsdl/partnerAPI">
        <Options>
            <RequestType>Asynchronous</RequestType>
        </Options>
...