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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
One change · mcp

Multi Round-Trip Requests changedspecification/2026-07-28/basic/patterns/mrtr

Nearest release: v2.1.284, published 4 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 28 Sep 2026 21:57 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 28 Sep 2026 22:07 UTC.

Upstream edited
Recorded here
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From line 181 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits3to this page, all time

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182182Servers **MAY** send `InputRequiredResult` responses on the following client requests:
183183 
184| Client Request | Supports InputRequiredResult |
185| -------------------------------------------------------------------------------- | ---------------------------- |
186| [`prompts/get`](/specification/2026-07-28/server/prompts#getting-a-prompt) | Yes |
187| [`resources/read`](/specification/2026-07-28/server/resources#reading-resources) | Yes |
188| [`tools/call`](/specification/2026-07-28/server/tools#calling-tools) | Yes |
184| Client Request | Supports InputRequiredResult |
185| - | - |
186| [`prompts/get`](/specification/2026-07-28/server/prompts#getting-a-prompt) | Yes |
187| [`resources/read`](/specification/2026-07-28/server/resources#reading-resources) | Yes |
188| [`tools/call`](/specification/2026-07-28/server/tools#calling-tools) | Yes |
189189 
190190Servers **MUST NOT** send `InputRequiredResult` responses on any other client requests.
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