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How to Fix API Error 429

Respect Retry-After, use exponential backoff, cache repeated work and monitor quotas.

Start with the diagnosis

HTTP 429 means a client exceeded a provider limit during a time window or exhausted a shared quota.

Step by step

01

Read the Retry-After header

Confirm the result before moving to the next step.

02

Implement exponential backoff

Confirm the result before moving to the next step.

03

Add random jitter

Confirm the result before moving to the next step.

04

Cache repeatable results

Confirm the result before moving to the next step.

05

Track usage per user and operation

Confirm the result before moving to the next step.

Safety checklist

  • Do not retry immediately forever
  • Do not rotate keys to evade limits
  • Show a useful retry state to the user
Official reference
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QUESTION CHAIN

Continue without starting over

  1. 1What should I verify first?Do not retry immediately forever
  2. 2What else can I do in Development?Search relevant tools, software and solution paths.
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