Rate limit

To prevent server abuse and to differentiate between free and paid licenses, API requests made to the server are limited to 240 megapixels per minute for Enterprise licenses and to 30 megapixels per minute for Community licenses.

The rate limit has a sliding window of one minute. When the server request is made, the sum of all image sizes sent within the last minute is checked and:

• If the sum does not exceed the rate limit, the request goes through.
• If the sum exceeds the rate limit, the request does not go through and you receive an HTTP 429 error in Studio with this error message: Error: Rate limit exceeded. If you're on a free tier, consider upgrading to paid license. If already on a paid license, please contact UiPath for further upgrade options.

Given the fact there is a one minute sliding window rate limit and the requests are retried, for a failed request to go through, more bandwidth needs to become available.

Let's take the example below:

12:00:00 - image request 5MP >> 25MP available
12:00:01 - image request 5MP >> 20MP available
12:00:02 - image request 5MP >> 15MP available
12:00:03 - image request 5MP >> 10MP available
12:00:04 - image request 5MP >> 5MP available
12:00:05 - image request 5MP >> 0MP available
12:00:06 - image request 5MP >> failed request - no more quota left
...
12:01:00 - 5MP available

So, in this example, the 12:00:06 request can only go through at 12:01:00.

If you have a Community license and the 30 megapixels per minute is not enough, we suggest switching to an Enterprise license.

If you have an Enterprise license and you frequently reach the 240 megapixels per minute limit, please contact us.