---
title: "Changes to Create a sandbox"
method: POST
path: "/v2/sandboxes/boxes"
---

# Changes to Create a sandbox

`POST /v2/sandboxes/boxes`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 11 of 48 revisions.

- **2026-05-27** `a0acb3a6a101` — 3 warning, 16 info
- **2026-05-04** `d68594e2e78c` — 2 warning
- **2026-04-30** `99490d1e837e` — 2 warning, 4 info
- **2026-04-13** `e86be67718ee` — 1 breaking, 1 warning, 12 info
- **2026-03-31** `9b9d7777d6a9` — 1 info
- **2026-03-23** `aa05bc5a3c17` — 2 info
- **2026-03-20** `6da148fb416d` — 3 info
- **2026-03-19** `7bbcecd856b2` — 1 warning
- **2026-03-19** `7099ceca2401` — 1 info
- **2026-03-17** `59a955354a01` — 2 breaking
- **2026-03-17** `e2fb935dc434` — 1 info

## Changes

- **2026-05-27** `a0acb3a6a101` — 3 warning, 16 info
  - removed the request property `ttl_seconds`
  - removed the optional property `expires_at` from the response with the `201` status
  - removed the optional property `ttl_seconds` from the response with the `201` status
  - added the new optional request property `delete_after_stop_seconds`
  - added the new optional request property `proxy_config/callbacks/items/full_request`
  - added the new optional request property `restore_memory`
  - added the new optional request property `tag_value_ids`
  - added the non-success response with the status `504`
  - removed the non-success response with the status `408`
  - added the optional property `created_by` to the response with the `201` status
  - added the optional property `delete_after_stop_seconds` to the response with the `201` status
  - added the optional property `detail/error_id` to the response with the `400` status
  - added the optional property `detail/error_id` to the response with the `409` status
  - added the optional property `detail/error_id` to the response with the `422` status
  - added the optional property `detail/error_id` to the response with the `429` status
  - added the optional property `detail/error_id` to the response with the `500` status
  - added the optional property `proxy_config/callbacks/items/full_request` to the response with the `201` status
  - added the optional property `stopped_at` to the response with the `201` status
  - added the optional property `updated_by` to the response with the `201` status
- **2026-05-04** `d68594e2e78c` — 2 warning
  - removed the request property `timeout`
  - removed the request property `wait_for_ready`
- **2026-04-30** `99490d1e837e` — 2 warning, 4 info
  - removed the request property `template_name`
  - removed the optional property `template_name` from the response with the `201` status
  - added the new optional request property `proxy_config/callbacks`
  - added the new optional request property `snapshot_name`
  - added the optional property `proxy_config/callbacks` to the response with the `201` status
  - added the optional property `size_class` to the response with the `201` status
- **2026-04-13** `e86be67718ee` — 1 breaking, 1 warning, 12 info
  - removed the required property `proxy_config/rules/items/inject_headers` from the response with the `201` status
  - removed the request property `proxy_config/rules/items/inject_headers`
  - the endpoint scheme security `X-Service-Key` was added to the API
  - added the new optional request property `fs_capacity_bytes`
  - added the new optional request property `mem_bytes`
  - added the new optional request property `proxy_config/rules/items/headers`
  - added the new optional request property `snapshot_id`
  - added the new optional request property `vcpus`
  - the request property `template_name` became optional
  - added the optional property `fs_capacity_bytes` to the response with the `201` status
  - added the optional property `mem_bytes` to the response with the `201` status
  - added the optional property `proxy_config/rules/items/headers` to the response with the `201` status
  - added the optional property `snapshot_id` to the response with the `201` status
  - added the optional property `vcpus` to the response with the `201` status
- **2026-03-31** `9b9d7777d6a9` — 1 info
  - added the new optional request property `proxy_config`
- **2026-03-23** `aa05bc5a3c17` — 2 info
  - added the new optional request property `idle_ttl_seconds`
  - added the optional property `idle_ttl_seconds` to the response with the `201` status
- **2026-03-20** `6da148fb416d` — 3 info
  - added the new optional request property `ttl_seconds`
  - added the optional property `expires_at` to the response with the `201` status
  - added the optional property `ttl_seconds` to the response with the `201` status
- **2026-03-19** `7bbcecd856b2` — 1 warning
  - removed the optional property `proxy_config` from the response with the `201` status
- **2026-03-19** `7099ceca2401` — 1 info
  - added the optional property `proxy_config/access_control` to the response with the `201` status
- **2026-03-17** `59a955354a01` — 2 breaking
  - the response property `proxy_config/rules` became optional for the status `201`
  - the `proxy_config/rules` response property's minItems was decreased from `1` to `0` for the response status `201`
- **2026-03-17** `e2fb935dc434` — 1 info
  - added the optional property `proxy_config` to the response with the `201` status

---

[Operation](https://skmtc.dev/langchain-ai/apis/langsmith/docs/v2/sandboxes/boxes/post.md) · [API](https://skmtc.dev/langchain-ai/apis/langsmith.md) · [Page](https://skmtc.dev/langchain-ai/apis/langsmith/changes/v2/sandboxes/boxes/post)