---
title: "Changes to Stream agent session events"
method: GET
path: "/agents/sessions/{session_id}/events"
---

# Changes to Stream agent session events

`GET /agents/sessions/{session_id}/events`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 8 of 88 revisions.

- **2026-10-29** `0a26f104d35f`: 5 info
- **2026-10-28** `81bec64c97ee`: 5 info
- **2026-10-23** `edf54d38a1a0`: 5 breaking, 5 info
- **2026-10-16** `d9e93345b02a`: 5 warning
- **2026-10-08** `93176c92c17d`: 1 breaking, 10 warning, 1 info
- **2026-10-08** `a95c419c9257`: 5 info
- **2026-10-06** `2605da219e32`: 5 warning
- **2026-10-05** `7f654af7f94f`: 1 info

## Changes

- **2026-10-29** `0a26f104d35f`: 5 info
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionCreated]/session/agent/experimental` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionFailed]/session/agent/experimental` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionIdle]/session/agent/experimental` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionInProgress]/session/agent/experimental` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionRequiresAction]/session/agent/experimental` to the response with the `200` status
- **2026-10-28** `81bec64c97ee`: 5 info
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionCreated]/session/agent/compaction` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionFailed]/session/agent/compaction` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionIdle]/session/agent/compaction` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionInProgress]/session/agent/compaction` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionRequiresAction]/session/agent/compaction` to the response with the `200` status
- **2026-10-23** `edf54d38a1a0`: 5 breaking, 5 info
  - added `#/components/schemas/AgentToolResourceAutomations` to the `oneOf[#/components/schemas/SessionEventAgentSessionCreated]/session/agent/tools/items/` response property `oneOf` list for the response status `200`
  - added `#/components/schemas/AgentToolResourceAutomations` to the `oneOf[#/components/schemas/SessionEventAgentSessionFailed]/session/agent/tools/items/` response property `oneOf` list for the response status `200`
  - added `#/components/schemas/AgentToolResourceAutomations` to the `oneOf[#/components/schemas/SessionEventAgentSessionIdle]/session/agent/tools/items/` response property `oneOf` list for the response status `200`
  - added `#/components/schemas/AgentToolResourceAutomations` to the `oneOf[#/components/schemas/SessionEventAgentSessionInProgress]/session/agent/tools/items/` response property `oneOf` list for the response status `200`
  - added `#/components/schemas/AgentToolResourceAutomations` to the `oneOf[#/components/schemas/SessionEventAgentSessionRequiresAction]/session/agent/tools/items/` response property `oneOf` list for the response status `200`
  - added `automations` discriminator mapping keys to the `oneOf[#/components/schemas/SessionEventAgentSessionCreated]/session/agent/tools/items/` response property for the response status `200`
  - added `automations` discriminator mapping keys to the `oneOf[#/components/schemas/SessionEventAgentSessionFailed]/session/agent/tools/items/` response property for the response status `200`
  - added `automations` discriminator mapping keys to the `oneOf[#/components/schemas/SessionEventAgentSessionIdle]/session/agent/tools/items/` response property for the response status `200`
  - added `automations` discriminator mapping keys to the `oneOf[#/components/schemas/SessionEventAgentSessionInProgress]/session/agent/tools/items/` response property for the response status `200`
  - added `automations` discriminator mapping keys to the `oneOf[#/components/schemas/SessionEventAgentSessionRequiresAction]/session/agent/tools/items/` response property for the response status `200`
- **2026-10-16** `d9e93345b02a`: 5 warning
  - removed the optional property `oneOf[#/components/schemas/SessionEventAgentSessionCreated]/session/spend_control` from the response with the `200` status
  - removed the optional property `oneOf[#/components/schemas/SessionEventAgentSessionFailed]/session/spend_control` from the response with the `200` status
  - removed the optional property `oneOf[#/components/schemas/SessionEventAgentSessionIdle]/session/spend_control` from the response with the `200` status
  - removed the optional property `oneOf[#/components/schemas/SessionEventAgentSessionInProgress]/session/spend_control` from the response with the `200` status
  - removed the optional property `oneOf[#/components/schemas/SessionEventAgentSessionRequiresAction]/session/spend_control` from the response with the `200` status
- **2026-10-08** `93176c92c17d`: 1 breaking, 10 warning, 1 info
  - added `#/components/schemas/SessionEventAgentSessionEnvironmentSuspended, #/components/schemas/SessionEventAgentSessionEnvironmentExpired` to the response body `oneOf` list for the response status `200`
  - added the new `expired` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentConnected]/environment/status` response property for the response status `200`
  - added the new `expired` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentDisconnected]/environment/status` response property for the response status `200`
  - added the new `expired` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentFailed]/environment/status` response property for the response status `200`
  - added the new `expired` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentPending]/environment/status` response property for the response status `200`
  - added the new `expired` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentReady]/environment/status` response property for the response status `200`
  - added the new `suspended` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentConnected]/environment/status` response property for the response status `200`
  - added the new `suspended` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentDisconnected]/environment/status` response property for the response status `200`
  - added the new `suspended` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentFailed]/environment/status` response property for the response status `200`
  - added the new `suspended` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentPending]/environment/status` response property for the response status `200`
  - added the new `suspended` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionEnvironmentReady]/environment/status` response property for the response status `200`
  - added `agent.session.environment.suspended, agent.session.environment.expired` mapping keys to the response discriminator for the response status `200`
- **2026-10-08** `a95c419c9257`: 5 info
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionCreated]/session/spend_control` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionFailed]/session/spend_control` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionIdle]/session/spend_control` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionInProgress]/session/spend_control` to the response with the `200` status
  - added the optional property `oneOf[#/components/schemas/SessionEventAgentSessionRequiresAction]/session/spend_control` to the response with the `200` status
- **2026-10-06** `2605da219e32`: 5 warning
  - added the new `billing_not_active` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionTurnCancelled]/turn/error/anyOf[#/components/schemas/SessionTurnErrorResource]/code` response property for the response status `200`
  - added the new `billing_not_active` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionTurnCompleted]/turn/error/anyOf[#/components/schemas/SessionTurnErrorResource]/code` response property for the response status `200`
  - added the new `billing_not_active` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionTurnCreated]/turn/error/anyOf[#/components/schemas/SessionTurnErrorResource]/code` response property for the response status `200`
  - added the new `billing_not_active` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionTurnFailed]/turn/error/anyOf[#/components/schemas/SessionTurnErrorResource]/code` response property for the response status `200`
  - added the new `billing_not_active` enum value to the `oneOf[#/components/schemas/SessionEventAgentSessionTurnInProgress]/turn/error/anyOf[#/components/schemas/SessionTurnErrorResource]/code` response property for the response status `200`
- **2026-10-05** `7f654af7f94f`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/omnistack-sh/apis/openai-api/docs/agents/sessions/:session_id/events/get.md) - [API](https://skmtc.dev/omnistack-sh/apis/openai-api.md) - [Page](https://skmtc.dev/omnistack-sh/apis/openai-api/changes/agents/sessions/:session_id/events/get)