API limits and cost for Q business chatSync API

Question

We are planning on building a chatbot with the help of Q Business using custom UI. This chatbot will interact with Q business via chatSync API. On server side the API call is authenticated by using a session aware id token returned by Cognito. We wanted the following information - 
1. Since Q business usage is charged based on number of users, will each session aware temporary credential count as an individual user? We are using the same Identity Center application to exchange tokens
2. What is the throttling limit for the chatSync API calls?

Ramakrishna Natarajan · Accepted Answer

Hi,

To your question-1, since the Subscription tiers are assigned to users through the Amazon Q Business console and the chatSync API calls are connected to this specific userID i.e. they are augmented with an IAM Identity Center token. The billing should be as per the subscriptions added, as defined in [Amazon Q Business pricing](https://aws.amazon.com/q/business/pricing/).

To your question-2, I would suggest reaching out to AWS support to understand the specific throttling limits for the chatSync API. As per [Service quotas for Amazon Q Business](https://docs.aws.amazon.com/amazonq/latest/qbusiness-ug/quotas-regions.html), this limit is 5 Maximum number of queries per second (QPS) per index if you use the UI and this limit is adjustable via Support. So, best to reach out to them for further clarity.

Hope this is helpful!

Thanks,
Rama

API limits and cost for Q business chatSync API

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