---
title: "Changes to Create a build-to-order cart"
method: POST
path: "/carts/build-to-order"
---

# Changes to Create a build-to-order cart

`POST /carts/build-to-order`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 7 of 15 revisions.

- **2026-10-20** `efe485119dd7`: 2 info
- **2026-10-19** `87f98453866f`: 1 info
- **2026-10-15** `223234fa2ded`: 2 breaking
- **2026-09-26** `5fe44535e1ab`: 2 info
- **2026-09-18** `78c545d96a34`: 4 breaking, 17 warning, 1 info
- **2026-09-17** `2a0b497bcf22`: 1 breaking, 1 warning, 2 info
- **2026-09-16** `9ea18a1c9c8a`: 1 info

## Changes

- **2026-10-20** `efe485119dd7`: 2 info
  - added the required property `data/dropped_accessories` to the response with the `200` status
  - added the required property `data/dropped_accessories` to the response with the `201` status
- **2026-10-19** `87f98453866f`: 1 info
  - added the new optional request property `promo_codes`
- **2026-10-15** `223234fa2ded`: 2 breaking
  - the `metadata/additionalProperties/` request property type changed from `string` to no type
  - the `data/metadata/additionalProperties/` response's property type changed from `string` to no type for status `201`
- **2026-09-26** `5fe44535e1ab`: 2 info
  - added the new optional request property `validate_only`
  - added the success response with the status `200`
- **2026-09-18** `78c545d96a34`: 4 breaking, 17 warning, 1 info
  - added the new required request property `manufacturer_id`
  - added the new required request property `model_id`
  - added the new required request property `style_id`
  - added the new required request property `variant_id`
  - removed the request property `pga`
  - removed the request property `vehicles`
  - added the new `external_id_in_use` enum value to the `code` response property for the response status `400`
  - added the new `external_id_in_use` enum value to the `code` response property for the response status `401`
  - added the new `external_id_in_use` enum value to the `code` response property for the response status `403`
  - added the new `external_id_in_use` enum value to the `code` response property for the response status `429`
  - added the new `external_id_in_use` enum value to the `code` response property for the response status `500`
  - added the new `requires_ekho_review` enum value to the `code` response property for the response status `400`
  - added the new `requires_ekho_review` enum value to the `code` response property for the response status `401`
  - added the new `requires_ekho_review` enum value to the `code` response property for the response status `403`
  - added the new `requires_ekho_review` enum value to the `code` response property for the response status `429`
  - added the new `requires_ekho_review` enum value to the `code` response property for the response status `500`
  - added the new `resource_not_writable` enum value to the `code` response property for the response status `400`
  - added the new `resource_not_writable` enum value to the `code` response property for the response status `401`
  - added the new `resource_not_writable` enum value to the `code` response property for the response status `403`
  - added the new `resource_not_writable` enum value to the `code` response property for the response status `429`
  - added the new `resource_not_writable` enum value to the `code` response property for the response status `500`
  - added the new optional request property `accessories`
- **2026-09-17** `2a0b497bcf22`: 1 breaking, 1 warning, 2 info
  - added the new required request property `vehicles/items/style_id`
  - removed the request property `vehicles/items/style_key`
  - api tag `Checkout Carts` added
  - api tag `Cart` removed
- **2026-09-16** `9ea18a1c9c8a`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/ekho/apis/ekho-api/docs/carts/build-to-order/post.md) · [API](https://skmtc.dev/ekho/apis/ekho-api.md) · [Page](https://skmtc.dev/ekho/apis/ekho-api/changes/carts/build-to-order/post)