Running Selenium on Azure Web App

PhantomJS does not work today in the sandbox that Azure Web Apps run under. See the wiki for a list of things that are known to not work currently, as well as lots of other information about the sandbox.

I would rethink your solution of using Selenium here. Selenium is used to automate manual testing of your webapp. Basically, automate filling out a form, click a button, etc.

Even if Selenium and your PhantomJS Driver does run on your Azure webapp without issues, you'll have a bottleneck of one browser per 1 Http request. I suspect you'll run into performance problems real soon.

Furthermore, the time it takes for drivers to load PhantomJS, request a page, interact, and close PhantomJS is slow.

In your case, it sounds like you're not interacting with your source site, you just need data. So perhaps just parsing the HTML DOM will suffice.