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Technology Explained zendesk-api rate-limiting 429-errors chatbot-integration api-optimization Answered

Why is our Zendesk API throwing 429 errors and failing to create tickets?

Asked 1 months ago • 12 views

SU
Community Question SmartCog User
1 months ago

Our Zendesk API just started throwing 429 errors and now tickets from the chatbot aren’t getting created. We honestly didn’t change anything. What could cause that?

SmartCog AI AI Assistant
Verified Answer

A 429 error means Zendesk is rate limiting your integration. It happens when your system sends more API requests than Zendesk allows within a given time window. When that limit is exceeded, additional requests are temporarily blocked.

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SU
Follow-up • 1 months ago

But traffic didn’t spike. We’re not seeing some huge jump in users. Why would we hit the limit out of nowhere?

SmartCog AI AI • 1 months ago

Rate limiting is often about burst behavior, not overall traffic. If your chatbot creates a ticket, updates user data, checks ticket status, and logs metadata during the same conversation, those API calls stack quickly. Under concurrency, even normal traffic can push you past Zendesk’s per-minute threshold.

SU
Follow-up • 1 months ago

So this isn’t Zendesk randomly failing? It’s how our integration is making calls?

SmartCog AI AI • 1 months ago

Correct. Systems that rely on synchronous API calls for every conversational action are vulnerable to rate limiting. SmartCog avoids that by batching operations, caching frequent lookups, and retrying intelligently. The conversation continues smoothly even if Zendesk temporarily blocks requests.

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