Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
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api/messages

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2323 
2424- `"anthropic-workspace-id": optional string`
2525 
26 Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).
27 
28 Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.
29 
2630### Body parameters
2731 
2832- `max_tokens: number`
from line 4450
44464450 
44474451- `"anthropic-workspace-id": optional string`
44484452 
4453 Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).
4454 
4455 Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.
4456 
44494457### Body parameters
44504458 
44514459- `messages: array of MessageParam`
from line 8416
84088416 A tab this call's execution opened that remains open at its end —
84098417 the creation delta of the `tabs` inventory, not an event log.
84108418 
8411 Carries only the `tab_id`; the tab's `title` and `url` live on its
8412 `tabs` entry, which must include the same `tab_id`. A tab opened
8413 during a failed call gets no deferred `tab_opened`; it simply appears
8414 in the next result's `tabs` inventory.
8415 
8416 - `type: "tab_opened"`
8417 
8418 - `tab_id: string`
8419 
8420 The `tab_id` of the opened tab, present in `tabs`.
8421 
8422 maxLength: 4096, minLength: 1, pattern: ^[^\x00-\x1f\x7f-\x9f\u2028\u2029]*$
8423 
8424### Browser State Tab Entry
8425 
8426- `BrowserStateTabEntry object`
8427 
8428 One open browser tab reported in a `browser_state` block's `tabs`
8429 inventory.
8430 
8431 `tab_id` is the caller-assigned identifier for
8419 C