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Cognitive Services pricing—Emotion API

Use intelligence APIs to enable vision, speech, language, and knowledge capabilities

Microsoft’s cutting-edge, cloud-based, emotion recognition algorithms (preview) let you build more personalised apps. The API identifies emotions in the wild based on facial expressions that are universal.

Pricing details

The below pricing reflects a preview discount.

Tier Features Unit Price
Emotion API—Free 30,000 image transactions free per month
3,000 status queries per month (limited to 5 per min)
Transactions Free
Emotion API—Basic 10 image transactions per second
(face must be pre-specified)
Transactions $- per 1,000 transactions
Emotion API—Standard 10 image transactions per second
30,000 status queries per month (limited to 10 per min)
Transactions $- per 1,000 transactions

Support & SLA

  • Free billing and subscription management support are included.
  • Need tech support for preview services? Use our forums.
  • We guarantee that Cognitive Services running in the standard tier will be available at least 99.9 percent of the time. No SLA is provided for the free trial. Read the SLA.
  • No SLA during preview period. Learn more.


  • Bing Search APIs are invoiced based on number of transactions (also known as API calls). These plans are pay-as-you-go and does not incur additional cost for complex queries and more than 10 results (up to 50 results in most cases).

  • If you happen to exceed the mentioned number of transactions per second (TPS), your usage will be throttled to be within the mentioned limit. If your application needs to have higher TPS than the ones mentioned on this page, please reach out to the Azure support team.

  • For billing purposes, a transaction is a successful Bing API call request (though there are caveats for DoS attacks). For logging and reporting purposes such as for the Bing Statistics Add-in, it is any Bing API call irrespective of whether it is successful or not.

  • You can change the tier of service anytime. Please make sure you use appropriate keys in your API calls. If you are having enterprise agreement with Microsoft, please work with your account executive.


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