https://community.appian.com/discussions/f/new-to-appian/25576/update-process-variable-from-webapi-callHow do I update a process variable in process model instance via WebAPI ? ============================================================ The use case is an external system which triggers an onboarding process. It calls a webAPI which starts an onboardingen-USTelligent Community 12https://community.appian.com/thread/99855?ContentTypeID=1Sun, 21 Aug 2022 07:25:30 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:4bc9245d-3ec2-4cf7-823c-6a532f59d100Stefan Helzle<p>I recommend to not have a waiting process instance, but persist the data to DB and just start the follow up process as the external site calls the API. This is way more scalable.</p><div style="clear:both;"></div>https://community.appian.com/thread/99843?ContentTypeID=1Sat, 20 Aug 2022 10:40:57 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:026c233e-c073-464f-89c4-9da19dcc0444deepakg271869<p>You can use set External PV&#39;s Smart service to set the variable for the particular instance. You can create a separate process which can use this smart service and on submission of the external form, call the newly create process model to set the process variable value.</p><div style="clear:both;"></div>