Hi there @daiva 

A 429 error indicates that you're hitting rate limits usage quotas when making API calls to ServiceNow. 

Check Review ServiceNow's API rate limits and quotas. make sure that you're not exceeding the allowed number of requests per minute or per hour.

Configure JMeter to implement an exponential backoff strategy. This means that if you receive a 429 error, your script waits for an increasing amount of time before retrying the request. This helps to reduce the frequency of requests and stay within the rate limits.

If this helps kindly upvote and accept the answer thanks much.