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2026-03-16 09:55:20 -05:00

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.. _vary_header:
Vary Header
===========
In order to assist caching proxies and CDNs, PostgREST includes a ``Vary`` header of value
``Accept, Prefer, Range`` in its responses which should fit most of the bills. As any other
response header, it's available for override
by updating ``response.headers`` GUC variable accordingly, for example:
.. code-block:: postgres
-- Override the Vary header to include Accept, Prefer and X-Test-Vary headers
perform set_config('response.headers', '[{"Vary": "Accept, Prefer, X-Test-Vary"}]', true);
In this case PostgREST will use provided value verbatim.