The response was produced or transformed by a proxy rather than the origin server.
Quick facts
When does it occur
The response was produced or transformed by a proxy rather than the origin server.
It belongs to the 2xx Successful class of responses, defined in RFC7231#6.3.4.
Browse all codes in this class: 2xx Successful
Frequently asked questions
203 belongs to the 2xx Successful class and is usually cacheable per headers such as Cache-Control (e.g. 200, 301, 304).
2xx Successful: The response was produced or transformed by a proxy rather than the origin server.
Sources & standards
Updated 2026-09-13
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This page provides original, human-reviewed information about HTTP status codes such as 203, the HTTP Status Code Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
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