Get Session Thread changedapi/beta/sessions/threads/retrieve
Nearest release: v2.1.294, published an hour after 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+82added
Lines−2removed
From line
133
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First seen
14 Aug 2026
this site's first read of the page
Recorded edits18to this page, all time
The whole hunk
from line 133, old and new numbered
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133133
134134- `BetaManagedAgentsSessionThread object`
135135
136 An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator.
136 An execution thread within a `session`. Each session has one primary thread plus zero or more child threads.
137137
138138 - `type: "session_thread"`
139139
from line 173
173173
174174 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
175175
176 - `"claude-haiku-5-5"`
177
178 Fastest model for high-volume, real-time tasks
179
176180 - `"claude-sonnet-5-5"`
177181
178182 Efficient model for coding and agents
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512516 The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask.
513517
518 - `url_sources: BetaManagedAgentsWebFetchURLSources or null`
519
520 Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source.
521
522 - `client_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
523
524 Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results.
525
526 - `BetaManagedAgentsWebFetchURLSourceAll object`
527
528 Every URL from this source may be fetched. This is the default.
529
530 - `type: "all"`
531
532 - `BetaManagedAgentsWebFetchURLSourceNone object`
533
534 This source contributes no URLs that may be fetched.
535
536 - `type: "none"`
537
538 - `BetaManagedAgentsWebFetchURLSourceOnly object`
539
540 Only the named tools' results contribute URLs that may be fetched.
541
542 - `type: "only"`
543
544 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
545
546 The tools whose results contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "none" to allow no tool's results.
547
548 - `type: "tool_reference"`
549
550 Must be "tool_reference".
551
552 - `name: string`
553
554 Name of the tool. Compared exactly, so upper and lower case letters are different.
555
556 minLength: 1, maxLength: 128
557
558 - `BetaManagedAgentsWebFetchURLSourceExcept object`
559
560 Every tool's results contribute URLs that may be fetched, except the named tools' results.
561
562 - `type: "except"`
563
564 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
565
566 The tools whose results do not contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "all" to leave out no tool's results.
567
568 - `type: "tool_reference"`
569
570 Must be "tool_reference".
571
572 - `name: string`
573
574 Name of the tool. Compared exactly, so upper and lower case letters are different.
575
576 minLength: 1, maxLength: 128
577
578 - `server_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
579
580 Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both.
581
582 - `user_input: BetaManagedAgentsWebFetchURLSourceUserInput or null`
583
584 Whether URLs in the text of user messages may be fetched. Null when not set, which allows them.
585
586 - `BetaManagedAgentsWebFetchURLSourceAll object`
587
588 Every URL from this source may be fetched. This is the default.
589
590 - `BetaManagedAgentsWebFetchURLSourceNone object`
591
592 This source contributes no URLs that may be fetched.
593
514594 - `allowed_domains: optional array of string`
515595
516596 - `blocked_domains: optional array of string`
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831911```json
832912{
833 "id": "sthr_011CZkZVWa6oIjw0rgXZpnBt",
913 "id": "sthr_011CZkZVWa6oJjw1rgXZpnBt",
834914 "agent": {
835915 "id": "agent_011CZkYqphY8vELVzwCUpqiQ",
836916 "description": "A focused research subagent.",
No line in this hunk matches that.