Messages changedapi/beta/messages
Nearest release: v2.1.286, published 6 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
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Lines+16added
Lines−0removed
From line
119
where the diff opens
First seen
14 Aug 2026
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Recorded edits20to this page, all time
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from line 119, old and new numbered
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from line 119
119119
120120 - `"mcp-client-2026-09-15"`
121121
122 - `"ce-plugins-2026-09-01"`
123
122124- `"anthropic-user-profile-id": optional string`
123125
124126 The user profile ID to attribute this request to. Use when acting on behalf of a party other than your organization. Requires the `user-profiles` beta header.
from line 7214
72127214 - `description: optional string or null`
72137215
72147216 The tool's description as the MCP server lists it.
7215
7216 - `BetaResponseToolRe
No line in this hunk matches that.