203 Non-Authoritative Information
2xx Successful
RFC 9110
Success, but this data came from a middleman, not the source.
What 203 Non-Authoritative Information means {#what}
The request succeeded, but the response metadata was modified by a proxy or mirror — it’s not coming straight from the origin server. Rarely seen in modern APIs. Prefer 200 unless you specifically need to signal a third-party source.
When you’ll see a 203 {#when}
- Proxy servers that transform or annotate responses
- Mirror/backup servers