Claude Platform Docs

List Events

beta.sessions.events.list(session_id, **kwargs) -> PageCursor<BetaManagedAgentsSessionEvent>
GET/v1/sessions/{session_id}/events

List Events

Parameters
session_id: String
created_at_gt: Time

Return events created after this time (exclusive). Compared against the event's processed_at value.

formatdate-time
created_at_gte: Time

Return events created at or after this time (inclusive). Compared against the event's processed_at value.

formatdate-time
created_at_lt: Time

Return events created before this time (exclusive). Compared against the event's processed_at value.

formatdate-time
created_at_lte: Time

Return events created at or before this time (inclusive). Compared against the event's processed_at value.

formatdate-time
limit: Integer

Query parameter for limit

formatint32
order: :asc | :desc

Sort direction for results, ordered by the event's processed_at. Defaults to asc (chronological).

One of the following:
:asc
:desc
page: String

Opaque pagination cursor from a previous response's next_page.

types: Array[String]

Filter by event type. Values match the type field on returned events (for example, user.message or agent.tool_use). Omit to return all event types.

betas: Array[AnthropicBeta]

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

One of the following:
String = String
AnthropicBeta = :"message-batches-2024-09-24" | :"prompt-caching-2024-07-31" | :"computer-use-2024-10-22" | 38 more
One of the following:
:"message-batches-2024-09-24"
:"prompt-caching-2024-07-31"
:"computer-use-2024-10-22"
:"computer-use-2025-01-24"
:"pdfs-2024-09-25"
:"token-counting-2024-11-01"
:"token-efficient-tools-2025-02-19"
:"output-128k-2025-02-19"
:"files-api-2025-04-14"
:"mcp-client-2025-04-04"
:"mcp-client-2025-11-20"
:"dev-full-thinking-2025-05-14"
:"interleaved-thinking-2025-05-14"
:"code-execution-2025-05-22"
:"extended-cache-ttl-2025-04-11"
:"context-1m-2025-08-07"
:"context-management-2025-06-27"
:"model-context-window-exceeded-2025-08-26"
:"skills-2025-10-02"
:"fast-mode-2026-02-01"
:"output-300k-2026-03-24"
:"user-profiles-2026-03-24"
:"user-profiles-2026-08-18"
:"advisor-tool-2026-03-01"
:"managed-agents-2026-04-01"
:"cache-diagnosis-2026-04-07"
:"dreaming-2026-04-21"
:"thinking-token-count-2026-05-13"
:"server-side-fallback-2026-06-01"
:"server-side-fallback-2026-07-01"
:"fallback-credit-2026-06-01"
:"fallback-credit-2026-07-01"
:"agent-memory-2026-07-22"
:"mid-conversation-tool-changes-2026-07-01"
:"compact-2026-01-12"
:"computer-use-2025-11-24"
:"mcp-tunnels-2026-06-22"
:"structured-outputs-2025-11-13"
:"task-budgets-2026-03-13"
:"thinking-display-updates-2026-08-18"
:"ce-user-management-2026-07-13"
Returns
BetaManagedAgentsSessionEvent = BetaManagedAgentsUserMessageEvent { id, content, type, processed_at } | BetaManagedAgentsUserInterruptEvent { id, type, processed_at, session_thread_id } | BetaManagedAgentsUserToolConfirmationEvent { id, result, tool_use_id, 4 more } | 32 more

Union type for all event types in a session.

One of the following:

List Events

require "anthropic"

anthropic = Anthropic::Client.new(api_key: "my-anthropic-api-key")

page = anthropic.beta.sessions.events.list("sesn_011CZkZAtmR3yMPDzynEDxu7")

puts(page)
{
  "data": [
    {
      "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy",
      "content": [
        {
          "text": "Where is my order #1234?",
          "type": "text"
        }
      ],
      "type": "user.message",
      "processed_at": "2026-03-15T10:00:00Z"
    },
    {
      "id": "sevt_011CZkZHPq1jCdq5lbRTjiVnz",
      "content": [
        {
          "text": "Let me look up order #1234 for you.",
          "type": "text"
        }
      ],
      "processed_at": "2026-03-15T10:00:00Z",
      "type": "agent.message"
    }
  ],
  "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo="
}
Returns Examples
{
  "data": [
    {
      "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy",
      "content": [
        {
          "text": "Where is my order #1234?",
          "type": "text"
        }
      ],
      "type": "user.message",
      "processed_at": "2026-03-15T10:00:00Z"
    },
    {
      "id": "sevt_011CZkZHPq1jCdq5lbRTjiVnz",
      "content": [
        {
          "text": "Let me look up order #1234 for you.",
          "type": "text"
        }
      ],
      "processed_at": "2026-03-15T10:00:00Z",
      "type": "agent.message"
    }
  ],
  "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo="
}