---
title: "List Sessions"
method: GET
path: "/agent/sessions"
tags: ["Runtime"]
---

# List Sessions

`GET /agent/sessions`

List session summaries from the active memory backend.

Returns 501 when the adapter doesn't support listing (an ADK agent,
or a LangGraph agent without a checkpointer). When SSO is enabled,
the user id from the JWT is forwarded to the adapter for per-user
scoping.

## Response `200`

Successful Response

- SessionSummary[]
  - `id` string, required — AG-UI thread id used for routing.
  - `lastUpdateTime` number, nullable — Epoch seconds.
  - `userId` string, nullable
  - `threadId` string, nullable — AG-UI thread id; equals id for LangGraph, may differ for ADK.
  - `preview` string, nullable — First user-authored text, ~120 chars max.

---

[API](https://skmtc.net/idun-group/apis/idun-agent-engine-server.md) · [All operations](https://skmtc.net/idun-group/apis/idun-agent-engine-server/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/idun-group/idun-agent-engine-server/versions/8909cd73cc1c/schema)