Threads changedapi/beta/sessions/threads
Nearest release: v2.1.301, published 11 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+25added
Lines−5removed
From line
45
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First seen
14 Aug 2026
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Recorded edits27to this page, all time
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from line 45
4545
4646- `"anthropic-version": optional string`
4747
48 The version of the Claude API you want to use.
49
50 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
51
4852- `"anthropic-beta": optional array of AnthropicBeta`
4953
50 Optional header to specify the beta version(s) you want to use.
54 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
5155
5256 - `string`
5357
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11251129- `"anthropic-version": optional string`
11261130
1131 The version of the Claude API you want to use.
1132
1133 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
1134
11271135- `"anthropic-beta": optional array of AnthropicBeta`
11281136
1129 Optional header to specify the beta version(s) you want to use.
1137 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
11301138
11311139 - `string`
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from line 2202
21942202
21952203- `"anthropic-version": optional string`
21962204
2205 The version of the Claude API you want to use.
2206
2207 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
2208
21972209- `"anthropic-beta": optional array of AnthropicBeta`
21982210
2199 Optional header to specify the beta version(s) you want to use.
2211 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
22002212
22012213 - `string`
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78257837
78267838- `"anthropic-version": optional string`
78277839
7840 The version of the Claude API you want to use.
7841
7842 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
7843
78287844- `"anthropic-beta": optional array of AnthropicBeta`
78297845
7830 Optional header to specify the beta version(s) you want to use.
7846 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
78317847
78327848 - `string`
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from line 8183
81678183
81688184 - `session_thread_id: optional string or null`
81698185
8170 Set by the server to the subagent thread this confirmation was routed to. Omitted when it was routed to the primary thread.
8171
8172 - `BetaManagedAgentsUserCustomToolResultEvent object`
8173
8174 Event sent by the client providing the result of a custom tool execution.
8175
8176 - `type: "user.custom_tool_result"`
8177
8178 - `id: string`
8179
8180 Unique identifier for this event.
8181
8182 - `custom_tool_use_id: string`
8183
8184 The id of the `agent.custom_tool_use` event this result corresponds to. It is also listed in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list?sdk_languages=http#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field.
8185
8186 - `content: optional array of BetaManagedAgentsTextBlock or BetaManagedAgentsImageBlock or BetaManagedAgentsDo
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