Google distancematrix API without a key

[Anwar Mian via StackOverflow]

I have a python script to calculate driving distance between two points. Here's my my API call. I did not use any API Key.

urlGoogle = "https://maps.googleapis.com/maps/api/distancematrix/json?origins=" + origZip + "&destinations=" + destZip + "&mode=driving&units=imperial&language=en-EN"

Once while testing with lots of data I got an error of exceeding the limit. My question is how does Google track/monitor my usage without a key.

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http://stackoverflow.com/questions/28502990/google-distancematrix-api-without-a-key

[geocodezip via StackOverflow]

By your server's ip address. Which could be problematic if you are on a shared server.

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http://stackoverflow.com/questions/28502990/google-distancematrix-api-without-a-key/28503507#28503507

[Anwar Mian via StackOverflow]

I have a python script to calculate driving distance between two points. Here's my API call. I did not use any API Key.

urlGoogle = "https://maps.googleapis.com/maps/api/distancematrix/json?origins=" + origZip + "&destinations=" + destZip + "&mode=driving&units=imperial&language=en-EN"

Once while testing with lots of data I got an error of exceeding the limit. My question is how does Google track/monitor my usage without a key.

[Anwar Mian via StackOverflow]

I have a python script to calculate driving distance between two points. Here's my API call. I did not use any API Key.

urlGoogle = "https://maps.googleapis.com/maps/api/distancematrix/json?origins=" + origZip + "&destinations=" + destZip + "&mode=driving&units=imperial&language=en-EN"

Once while testing with lots of data I got an error for exceeding the limit. My question is how does Google track/monitor my usage without a key.