Best way to batch POST to the CXone DNC API without tripping the 429s? The adaptive backoff logic keeps dropping half the batch since the client sleeps for 10s while X-RateLimit-Reset shows 2.5. We’re piping opt-outs from IVR and web forms into a Go worker, normalizing with libphonenumber, but it’s choking on the rate limits when syncing suppression lists across campaign environments via /api/v2/dnc/lists/{id}/entries.
req.Header.Set("Idempotency-Key", uuid.New().String())
resp, err := client.Do(req)
The dynamic window keeps shifting, kinda ruins the batch.
Skip the SDK wrapper. Honestly, the ADMIN UI completely ignores your request if the DNC LIST CONFIGURATION isn’t locked down, and you’ll just burn through retries. The worker sleeps past the reset timer and drops half the batch anyway. Push the raw array directly. You’ll need the DNC:EDIT SCOPE attached.
curl -X POST "https://api.mypurecloud.com/api/v2/dnc/lists/{id}/entries" \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d '[{"number":"+12025550199","reason":"opt_out","source":"ivr"}]'
HTTP 429 Too Many Requests with Retry-After: 10 crashes the batch because the DNC endpoint throttles per list ID, not global. Your Go worker’s sleep timer is over-indexing on the reset value. The suggestion above to drop the SDK is solid, but you’ll still hit 400s if the payload structure drifts during normalization. The entries array needs strict validation before the POST.
curl -X POST "https://api.mypurecloud.com/api/v2/dnc/lists/{listId}/entries" \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d '{"entries": [{"phoneNumber": "+12025550123", "type": "mobile", "optOut": true}]}'
Check the X-RateLimit-Remaining header on the 200 OK response. If it’s zero, flush the buffer immediately. The adaptive backoff in the client library assumes a global limit, but DNC is list-scoped. You’ll waste cycles sleeping while the list accepts more. libphonenumber output needs the country code prefix stripped if the list is region-locked, otherwise the DNC engine rejects it silently. Token refresh mid-batch causes 401s that look like drops.