429 Too Many Requests on /api/v2/users bulk update

NICE CXone API & Integrations
1

Struggling to figure out why…

  • I am hitting 429 errors when updating 50 users via PUT /api/v2/users/{id} in a loop.
  • My code retries immediately without delay.
  • Is there a specific backoff algorithm recommended by Genesys Cloud for this endpoint?
  • Should I parse the Retry-After header or use exponential backoff?
2

As far as I remember, the issue isn’t just the backoff algorithm but how you handle the rate limit headers. immediate retries trigger the 429 block because the window resets slowly. in my vault rotation scripts, i parse the x-ratelimit-reset header specifically. here is a quick python snippet using requests that works for me:

import requests
import time

resp = requests.put(url, headers=headers)
if resp.status_code == 429:
 reset_at = int(resp.headers.get('x-ratelimit-reset', 0))
 wait_time = max(0, reset_at - time.time())
 time.sleep(wait_time)
 # retry logic here

also, check your scope. ensure you have user:write. if you are batching, consider using the bulk update endpoint PUT /api/v2/users instead of looping individual ids. it reduces overhead significantly. i tested this with 100 users and saw zero 429s when respecting the reset header.

3

Don’t ignore the x-ratelimit-remaining header or you’ll brick your ServiceNow webhook queue. Parse it before every call and sleep for x-ratelimit-reset seconds when it hits zero, otherwise you’ll get throttled harder than a bad OAuth token exchange.

import time
# Pseudo-code logic
if response.headers.get('x-ratelimit-remaining') == '0':
 time.sleep(int(response.headers.get('x-ratelimit-reset')) - time.time())