Computer Vision services require special subscription keys. Every call to the Computer Vision API requires a subscription key. This key needs to be either passed through a query string parameter or specified in the request header.
To sign up for subscription keys, see Subscriptions. It's free to sign up. Pricing for these services is subject to change.
Your subscription keys are valid for only one of these Microsoft Azure Regions.
|East US 2||eastus2.api.cognitive.microsoft.com|
|West Central US||westcentralus.api.cognitive.microsoft.com|
If you sign up using the Computer Vision free trial, your subscription keys are valid for the westcentral region (
https://westcentralus.api.cognitive.microsoft.com/vision/v1.0/). That is the most common case. However, if you sign-up for Computer Vision with your Microsoft Azure account through the https://azure.microsoft.com/ website, you specify the region for your trial from the preceding list of regions.
For example, if you sign up for Computer Vision with your Microsoft Azure account and you specify
westus for your region, you must use the
westus region for your REST API calls (
If you forget the region for your subscription key after obtaining your trial key, you can find your region at https://azure.microsoft.com/try/cognitive-services/my-apis/.