curl -X GET 'https://api.anthropic.com/v1/sessions/session-id/threads?beta=true&limit=10&page=example-page' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

# GET /v1/sessions/{session_id}/threads?beta=true (Claude API)
Base URL: https://api.anthropic.com
Auth: x-api-key; Anthropic API key; required.
Status: Beta.
Last verified: 2026-10-20

> List Session Threads

## Critical Gotchas
* Authentication uses the `x-api-key` header and requests also require an `anthropic-version` header.
* The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

## cURL
curl -X GET 'https://api.anthropic.com/v1/sessions/session-id/threads?beta=true&limit=10&page=example-page' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| session_id | path | string | Yes | Path parameter session_id |
| limit | query | integer | No | Maximum results per page. Defaults to 1000. |
| page | query | string | No | Opaque pagination cursor from a previous response's `next_page`. Forward-only. |

## Response example
{"data":[{}],"next_page":"page_MjAyNS0wNS0xNFQwMDowMDowMFo="}

---
Need an API key? Get one at https://console.anthropic.com/settings/keys

GET

GET /v1/sessions/{session_id}/threads?beta=true — Claude API

Beta

Anthropic API key (required); https://api.anthropic.com

Claude API

List Session Threads

Base URL: https://api.anthropic.com
Auth: x-api-key: <ANTHROPIC_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 208 tokens · Vary: Accept

Critical gotchas

Authentication uses the x-api-key header and requests also require an anthropic-version header.

The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

cURL

curl -X GET 'https://api.anthropic.com/v1/sessions/session-id/threads?beta=true&limit=10&page=example-page' \  -H "x-api-key: $ANTHROPIC_API_KEY" \  -H 'anthropic-version: 2023-06-01'

Parameters

Name	In	Type	Required	Description
session_id	path	string	Yes	Path parameter session_id
limit	query	integer	No	Maximum results per page. Defaults to 1000.
page	query	string	No	Opaque pagination cursor from a previous response's `next_page`. Forward-only.

Response 200 OK

{
  "data": [
    {
      "type": "session_thread",
      "id": "sthr_011CZkZVWa6oIjw0rgXZpnBt",
      "session_id": "sesn_011CZkZAtmR3yMPDzynEDxu7",
      "status": "idle",
      "agent": {
        "type": "agent",
        "id": "agent_011CZkYqphY8vELVzwCUpqiQ",
        "version": 1,
        "name": "Researcher",
        "description": "A focused research subagent.",
        "model": {
          "id": "claude-opus-5",
          "speed": "standard"
        },
        "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.",
        "tools": [
          {
            "type": "agent_toolset_20260401",
            "default_config": {
              "enabled": true,
              "permission_policy": {
                "type": "always_ask"
              }
            },
            "configs": []
          }
        ],
        "mcp_servers": [],
        "skills": []
      },
      "parent_thread_id": null,
      "created_at": "2026-03-15T10:00:00Z",
      "updated_at": "2026-03-15T10:00:00Z",
      "archived_at": null,
      "usage": {
        "input_tokens": 0,
        "output_tokens": 0,
        "cache_read_input_tokens": 0,
        "cache_creation": {
          "ephemeral_5m_input_tokens": 0,
          "ephemeral_1h_input_tokens": 0
        }
      },
      "stats": {
        "duration_seconds": 0,
        "startup_seconds": 0,
        "active_seconds": 0
      }
    }
  ],
  "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo="
}

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