HTTP 407 Proxy Authentication Required vs 429 Too Many Requests
Both HTTP 407 (Proxy Authentication Required) and 429 (Too Many Requests) belong to the 4xx Client Error category. 407 indicates that the client must first authenticate itself with the proxy. Meanwhile, 429 means that the user has sent too many requests in a given time (rate limiting). The response should include a Retry-After header.
Description
The client must first authenticate itself with the proxy.
When You See It
When accessing the internet through a corporate proxy that requires authentication.
How to Fix
Configure proxy credentials in your HTTP client or browser settings.
Description
The user has sent too many requests in a given time (rate limiting). The response should include a Retry-After header.
When You See It
When hitting API rate limits or making too many requests too quickly.
How to Fix
Check the Retry-After header. Implement exponential backoff. Consider caching responses.
Key Differences
HTTP 407: The client must first authenticate itself with the proxy.
HTTP 429: The user has sent too many requests in a given time (rate limiting). The response should include a Retry-After header.
You encounter 407 when when accessing the internet through a corporate proxy that requires authentication.
You encounter 429 when when hitting API rate limits or making too many requests too quickly.
When to Use Which
For 407 (Proxy Authentication Required): Configure proxy credentials in your HTTP client or browser settings. For 429 (Too Many Requests): Check the Retry-After header. Implement exponential backoff. Consider caching responses.