## Get Session Thread

`$client->beta->sessions->threads->retrieve(string threadID, string sessionID, ?list<AnthropicBeta> betas): ManagedAgentsSessionThread`

**get** `/v1/sessions/{session_id}/threads/{thread_id}`

Get Session Thread

### Parameters

- `sessionID: string`

- `threadID: string`

- `betas?:optional list<AnthropicBeta>`

  Optional header to specify the beta version(s) you want to use.

### Returns

- `ManagedAgentsSessionThread`

  - `string id`

    Unique identifier for this thread.

  - `BetaManagedAgentsSessionThreadAgent agent`

    Resolved `agent` definition for a single `session_thread`. Snapshot of the agent at thread creation time. The multiagent roster is not repeated here; read it from `Session.agent`.

  - `?\Datetime archivedAt`

    A timestamp in RFC 3339 format

  - `\Datetime createdAt`

    A timestamp in RFC 3339 format

  - `?string parentThreadID`

    Parent thread that spawned this thread. Null for the primary thread.

  - `string sessionID`

    The session this thread belongs to.

  - `?ManagedAgentsSessionThreadStats stats`

    Timing statistics for a session thread.

  - `ManagedAgentsSessionThreadStatus status`

    SessionThreadStatus enum

  - `Type type`

  - `\Datetime updatedAt`

    A timestamp in RFC 3339 format

  - `?ManagedAgentsSessionThreadUsage usage`

    Cumulative token usage for a session thread across all turns.

### Example

```php
<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

$client = new Client(apiKey: 'my-anthropic-api-key');

$betaManagedAgentsSessionThread = $client->beta->sessions->threads->retrieve(
  'sthr_011CZkZVWa6oIjw0rgXZpnBt',
  sessionID: 'sesn_011CZkZAtmR3yMPDzynEDxu7',
  betas: ['message-batches-2024-09-24'],
);

var_dump($betaManagedAgentsSessionThread);
```

#### Response

```json
{
  "id": "sthr_011CZkZVWa6oIjw0rgXZpnBt",
  "agent": {
    "id": "agent_011CZkYqphY8vELVzwCUpqiQ",
    "description": "A focused research subagent.",
    "mcp_servers": [
      {
        "name": "example-mcp",
        "type": "url",
        "url": "https://example-server.modelcontextprotocol.io/sse"
      }
    ],
    "model": {
      "id": "claude-sonnet-4-6",
      "speed": "standard"
    },
    "name": "Researcher",
    "skills": [
      {
        "skill_id": "xlsx",
        "type": "anthropic",
        "version": "1"
      }
    ],
    "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.",
    "tools": [
      {
        "configs": [
          {
            "enabled": true,
            "name": "bash",
            "permission_policy": {
              "type": "always_allow"
            }
          }
        ],
        "default_config": {
          "enabled": true,
          "permission_policy": {
            "type": "always_ask"
          }
        },
        "type": "agent_toolset_20260401"
      }
    ],
    "type": "agent",
    "version": 1
  },
  "archived_at": null,
  "created_at": "2026-03-15T10:00:00Z",
  "parent_thread_id": null,
  "session_id": "sesn_011CZkZAtmR3yMPDzynEDxu7",
  "stats": {
    "active_seconds": 0,
    "duration_seconds": 0,
    "startup_seconds": 0
  },
  "status": "idle",
  "type": "session_thread",
  "updated_at": "2026-03-15T10:00:00Z",
  "usage": {
    "cache_creation": {
      "ephemeral_1h_input_tokens": 0,
      "ephemeral_5m_input_tokens": 0
    },
    "cache_read_input_tokens": 0,
    "input_tokens": 0,
    "output_tokens": 0
  }
}
```