---
title: "Retrieve an agent session artifact"
method: GET
path: "/agents/sessions/{session_id}/artifacts/{artifact_id}"
tags: ["Agents"]
---

# Retrieve an agent session artifact

`GET /agents/sessions/{session_id}/artifacts/{artifact_id}`

Retrieves immutable metadata for one durable session artifact. See [session artifacts](https://developers.openai.com/api/docs/guides/agents-api/environments/files#openai-hosted-artifacts).

## Path parameters

- `session_id` string, required
- `artifact_id` string, required

## Response `200`

The requested session artifact.

- SessionArtifactResource — An immutable file published by a completed hosted session turn.
  - `id` string, required — The immutable artifact ID.
  - `object` 'agent.session.artifact', required — The object type. Always `agent.session.artifact`.
  - `session_id` string, required — The ID of the session that owns the artifact.
  - `environment_id` string, required — The ID of the environment that produced the artifact.
  - `turn_id` string, required — The ID of the completed turn that published the artifact.
  - `path` string, required — The original absolute file path in the execution environment.
  - `size_bytes` integer, required — The immutable artifact size in bytes.
  - `created_at` integer, required — The Unix timestamp, in seconds, when the artifact was published.

## Other responses

- `400` — The request was invalid.
- `401` — Authentication or project context was missing.
- `403` — The API key lacks the required permission.
- `404` — The requested session or event was not found.
- `409` — The request conflicted with the current session state.
- `500` — An internal error occurred.
- `503` — The service is temporarily unavailable.

## Changes

- **2026-09-10** `f2dae1a9aced` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/openai/apis/openapi/changes/agents/sessions/:session_id/artifacts/:artifact_id/get.md)

---

[API](https://skmtc.dev/openai/apis/openapi.md) · [All operations](https://skmtc.dev/openai/apis/openapi/llms.txt) · [OpenAPI document](https://skmtc.dev/openai/apis/openapi/revisions/c8bd56db4095?raw)