Workflow to check External Website

Workflow to check External Website

Is it possible on Opmanager 12.1 to create a workflow to http to an external website, and notify if no response?
I tried to create a new workflow, added check URL to http://www.cnn.com, and then if no response , send an email to myself.
After that, the only option is trigger, but trigger requires you to pick a device. I don't have a device for www.cnn.com, so I'm unable to save the workflow.
Is it possible to create a workflow like this? Workflow looks like a very useful feature.

Thanks,
Dan

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