Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
One change · api

Create a Message changed

api/beta/messages/create

Nearest release: v2.1.277, published 4 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.

Recorded here
Lines+2added
Lines−2removed
From line 1,316 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits13to this page, all time

The whole hunk

from line 1316, old and new numbered
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lines
from line 1316
13161316 
13171317 - `BetaToolChangeMCPToolReference object`
13181318 
1319 Reference to a single MCP tool by its server and remote name — the
1319 Reference to a single MCP tool by its server and remote name; the
13201320 same `server_name`/`name` pair `mcp_tool_use` carries.
13211321 
13221322 - `type: "mcp_tool_reference"`
from line 1358
13581358 
13591359 - `BetaToolChangeMCPToolReference object`
13601360 
1361 Reference to a single MCP tool by its server and remote name — the
1361 Reference to a single MCP tool by its server and remote name; the
13621362 same `server_name`/`name` pair `mcp_tool_use` carries.
13631363 
13641364 - `BetaToolChangeMCPToolsetReference object`