---
title: "Download simulation steps parquet"
method: GET
path: "/simulations/{simulation_id}/steps/download"
tags: ["Simulations"]
---

# Download simulation steps parquet

`GET /simulations/{simulation_id}/steps/download`

## Request

- Base URL: `https://api.ionworks.com`
- URL: `https://api.ionworks.com/simulations/{simulation_id}/steps/download`
- Auth: none declared

Redirect to a short-lived signed URL for ``steps.parquet``.

Most HTTP clients follow redirects automatically, so the caller receives
the parquet bytes transparently. Pass ``redirect=false`` to get
``{"url": ...}`` instead — browsers must fetch the signed URL themselves
(see ``_simulation_parquet_download``).

## Path parameters

- `simulation_id` string, uuid, required

## Query parameters

- `redirect` boolean

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

## Changes

- **2026-09-30** `ea3d377fec1a`: 1 breaking
  - for the `path` request parameter `simulation_id`, the format changed from no format to `uuid`
- **2026-09-25** `2a3fc9725f80`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/ionworks/apis/ionworks-api/changes/simulations/:simulation_id/steps/download/get.md)

---

[API](https://skmtc.dev/ionworks/apis/ionworks-api.md) - [All operations](https://skmtc.dev/ionworks/apis/ionworks-api/llms.txt) - [OpenAPI document](https://skmtc.dev/ionworks/apis/ionworks-api/revisions/abebbbc5f60a?raw)