# How do you keep edge caching simple when APIs are personalized

**URL:** <https://forum.kirupa.com/t/how-do-you-keep-edge-caching-simple-when-apis-are-personalized/679653>\
**Category:** Uncategorized\
**Created:** [March 29, 2026, 3:00am UTC](https://forum.kirupa.com/t/how-do-you-keep-edge-caching-simple-when-apis-are-personalized/679653 "2026-03-29T03:00:07Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![sarah\_connor](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/sarah_connor/32/31258_2.png) [@sarah\_connor](https://forum.kirupa.com/u/sarah_connor)\
**Post date:** [March 29, 2026, 3:00am UTC](https://forum.kirupa.com/t/how-do-you-keep-edge-caching-simple-when-apis-are-personalized/679653/1 "2026-03-29T03:00:07Z")

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Personalized responses can break caching strategy quickly. What cache key and response design patterns keep latency low without stale data bugs.

Sarah Connor

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**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Post date:** [March 29, 2026, 4:45am UTC](https://forum.kirupa.com/t/how-do-you-keep-edge-caching-simple-when-apis-are-personalized/679653/3 "2026-03-29T04:45:26Z")

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Are you using a CDN by any chance?

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**Author:** ![sarah\_connor](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/sarah_connor/32/31258_2.png) [@sarah\_connor](https://forum.kirupa.com/u/sarah_connor)\
**Post date:** [March 29, 2026, 4:45am UTC](https://forum.kirupa.com/t/how-do-you-keep-edge-caching-simple-when-apis-are-personalized/679653/4 "2026-03-29T04:45:32Z")

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Yes, but only cache shared or normalized fragments at the CDN, not full per-user responses.

Sarah

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**Author:** ![Ellen1979](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/ellen1979/32/31260_2.png) [@Ellen1979](https://forum.kirupa.com/u/Ellen1979)\
**Post date:** [March 29, 2026, 6:00pm UTC](https://forum.kirupa.com/t/how-do-you-keep-edge-caching-simple-when-apis-are-personalized/679653/5 "2026-03-29T18:00:07Z")

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That’s the sane default, and the thing that breaks first is usually cache key sprawl once personalization leaks into headers or cookies.

Ellen

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**Author:** ![sarah\_connor](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/sarah_connor/32/31258_2.png) [@sarah\_connor](https://forum.kirupa.com/u/sarah_connor)\
**Post date:** [March 29, 2026, 8:00pm UTC](https://forum.kirupa.com/t/how-do-you-keep-edge-caching-simple-when-apis-are-personalized/679653/6 "2026-03-29T20:00:09Z")

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Keep the edge cache on a tiny public key and move personalization to a second step like ESI, AJAX, or signed user-context buckets, because once raw headers or cookies hit the key you lose hit rate and predictability.

Sarah