OpenAI API Gateway Error Messages Guide

Error Messages Guide

Troubleshoot common OpenAI API error messages. Find causes and solutions for gateway errors.

Common Error Messages

401 invalid_api_key +

Cause

Your API key is missing, invalid, or has been revoked.

Solution

Check your API key is correct. Ensure it starts with sk-. Regenerate if necessary from your OpenAI dashboard.

429 rate_limit_exceeded +

Cause

You've exceeded your rate limit for API requests.

Solution

Implement exponential backoff. Check your usage dashboard. Consider upgrading your plan for higher limits.

500 server_error +

Cause

OpenAI's servers experienced an internal error.

Solution

This is usually transient. Retry with exponential backoff. Check OpenAI status page for ongoing incidents.

503 service_unavailable +

Cause

OpenAI service is temporarily overloaded or undergoing maintenance.

Solution

Wait and retry. Implement circuit breaker pattern. Check status page for maintenance windows.

400 invalid_request_error +

Cause

Request is malformed or missing required parameters.

Solution

Validate request JSON. Check message format, required fields, and parameter types.

Debugging Tips

Check Response Headers

OpenAI returns rate limit info in headers: X-RateLimit-Limit, X-RateLimit-Remaining, Retry-After

Enable Request Logging

Log request/response bodies (without sensitive data) to debug issues. Check error details in response.

Use OpenAI Dashboard

Monitor usage, error rates, and latency in your dashboard. Identify patterns causing issues.

Implement Proper Error Handling

Catch specific error codes. Don't just retry all errors - some require code changes, not retries.

Frequently Asked Questions

Why do I keep getting 429 errors?
Rate limits depend on your plan and usage. Check your remaining quota in response headers. Implement backoff and consider upgrading.
Should I retry on 500 errors?
Yes, 500 errors are typically transient. Use exponential backoff with 3-5 retry attempts.
How do I find my API key?
Go to OpenAI Dashboard > API Keys. Never share or expose keys in client-side code.

Related Resources

Retry Strategies

Backoff patterns

Error Codes

Complete reference

Exception Handling

Patterns

Home

Back to hub