How do I check the functions runtime version?

To verify the exact version of the runtime you are using:

1. Retrieve the master key for your Function App (you can get the master key from the Functions Portal)
2. Browse to https://<functionappname>.azurewebsites.net/admin/host/status?code=<masterkey>

You will see a response similar to the following (depending on your browser/accept headers):

JSON

{"id":"functiondev-facaval2","state":"Running","version":"1.0.10917.0"}

XML

<HostStatus xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Microsoft.Azure.WebJobs.Script.WebHost.Models">
<Errors xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" i:nil="true"/>
<Id>functionappid</Id>
<Load i:nil="true"/>
<State>Running</State>
<Version>1.0.10917.0</Version>
</HostStatus>