Caching changedspecification/2026-07-28/server/utilities/caching
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Upstream edited this page at 20 Oct 2026 20:02 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 22 Oct 2026 20:37 UTC.
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1717* `resources/read`
1818
1919Interim results with `resultType: "input_required"` (see
20[multi round-trip requests](/specification/2026-07-28/basic/patterns/mrtr)) are not cacheable
20[multi round-trip requests](/specification/2026-07-28/basic/patterns/mrtr.md)) are not cacheable
2121and carry no caching hints.
2222
2323## Cache Key
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2828a request whose method or parameters differ from the request that produced it.
2929
3030Results produced by retrying a request through the
31[multi round-trip requests](/specification/2026-07-28/basic/patterns/mrtr) mechanism—that
31[multi round-trip requests](/specification/2026-07-28/basic/patterns/mrtr.md) mechanism—that
3232is, requests carrying `inputResponses` or `requestState`—**MUST NOT** be cached,
3333as they depend on inputs that are not part of the cache key.
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142142
143143## Interaction with Pagination
144144
145When a list result is [paginated](/specification/2026-07-28/server/utilities/pagination), each
145When a list result is [paginated](/specification/2026-07-28/server/utilities/pagination.md), each
146146page is an independently cacheable response—consistent with how HTTP
147147`Cache-Control` treats paginated resources.
148148
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