Forum Discussion

JVA's avatar
JVA
17 days ago

What are the rate limits of the API?

Since March 8, 2025 we have been getting HTTP 429 responses on rest/api/1.0/cycles/search. There is a page in documentation about that, but it does not contain the actual limits - https://support.smartbear.com/zephyr-squad-cloud-v1/docs/en/zephyr-squad-cloud-rest-api/api-rate-limiting-guide.html

Also, the 429 responses contain retry-after header, but the value is always 0. Of course, if I retry immediately, it fails again the same way. I tried implementing exponential backoff, but even 120 second delay was not enough. Which seems contradictory to the documentation that describes limits as per minute. 

Has anyone discovered what the actual limits are? 

Janis Vanags
Developer, eazyBI

APIs
  • sanjeevpande's avatar
    sanjeevpande
    Icon for Staff rankStaff
    15 days ago

    Hi Janis,

    The API rate limits are not publicly shared, as they are subject to change. We are currently assessing their impact on system resources and may adjust them further to enhance support.

    We recommend handling 429 errors by utilizing the Retry-After header to retry requests after the specified time in the response headers.

    The Retry-After header follows HTTP standards and is displayed in seconds.

    However, in certain cases where it was incorrectly shown as 0, we have implemented a fix that will be available on March 17.

    Best regards,

    Sanjeev