---
title: "Changes to Place an order"
method: POST
path: "/accounts/{account_id}/orders"
---

# Changes to Place an order

`POST /accounts/{account_id}/orders`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 6 of 12 revisions.

- **2026-08-31** `0def92bc65f5` — 7 info
- **2026-08-07** `2b28ad452881` — 2 breaking
- **2026-08-03** `250f4b477cbf` — 10 info
- **2026-07-27** `b95b7ffdc1eb` — 12 info
- **2026-07-17** `8e8a8242f1f2` — 3 breaking, 11 info
- **2026-07-13** `03da9bc8e86b` — 1 info

## Changes

- **2026-08-31** `0def92bc65f5` — 7 info
  - added the new optional `header` request parameter `Idempotency-Key`
  - added `#/components/schemas/Bill, #/components/schemas/CurrencyPair, #/components/schemas/Bond, #/components/schemas/MoneyMarketFund, #/components/schemas/AMC, #/components/schemas/ETF` to the `instrument` response property `anyOf` list for the response status `201`
  - added `#/components/schemas/Bill, #/components/schemas/CurrencyPair, #/components/schemas/Bond, #/components/schemas/MoneyMarketFund, #/components/schemas/AMC, #/components/schemas/ETF` to the `trades/items/instrument` response property `anyOf` list for the response status `201`
  - removed discriminator from `instrument` response property for the response status `201`
  - removed discriminator from `trades/items/instrument` response property for the response status `201`
  - removed `#/components/schemas/Bill, #/components/schemas/CurrencyPair, #/components/schemas/Bond, #/components/schemas/MoneyMarketFund, #/components/schemas/AMC, #/components/schemas/ETF` from the `instrument` response property `oneOf` list for the response status `201`
  - removed `#/components/schemas/Bill, #/components/schemas/CurrencyPair, #/components/schemas/Bond, #/components/schemas/MoneyMarketFund, #/components/schemas/AMC, #/components/schemas/ETF` from the `trades/items/instrument` response property `oneOf` list for the response status `201`
- **2026-08-07** `2b28ad452881` — 2 breaking
  - removed the required property `instrument/oneOf[subschema #1: Bill]/par_value` from the response with the `201` status
  - removed the required property `trades/items/instrument/oneOf[subschema #1: Bill]/par_value` from the response with the `201` status
- **2026-08-03** `250f4b477cbf` — 10 info
  - added the required property `instrument/oneOf[subschema #6: ETF]/currency_sentence` to the response with the `201` status
  - added the required property `instrument/oneOf[subschema #6: ETF]/display_name` to the response with the `201` status
  - added the required property `instrument/oneOf[subschema #6: ETF]/fund_base_currency` to the response with the `201` status
  - added the required property `instrument/oneOf[subschema #6: ETF]/headline` to the response with the `201` status
  - added the required property `instrument/oneOf[subschema #6: ETF]/rhp_years` to the response with the `201` status
  - added the required property `trades/items/instrument/oneOf[subschema #6: ETF]/currency_sentence` to the response with the `201` status
  - added the required property `trades/items/instrument/oneOf[subschema #6: ETF]/display_name` to the response with the `201` status
  - added the required property `trades/items/instrument/oneOf[subschema #6: ETF]/fund_base_currency` to the response with the `201` status
  - added the required property `trades/items/instrument/oneOf[subschema #6: ETF]/headline` to the response with the `201` status
  - added the required property `trades/items/instrument/oneOf[subschema #6: ETF]/rhp_years` to the response with the `201` status
- **2026-07-27** `b95b7ffdc1eb` — 12 info
  - added the optional property `instrument/oneOf[subschema #1: Bill]/icon_url` to the response with the `201` status
  - added the optional property `instrument/oneOf[subschema #2: CurrencyPair]/icon_url` to the response with the `201` status
  - added the optional property `instrument/oneOf[subschema #3: Bond]/icon_url` to the response with the `201` status
  - added the optional property `instrument/oneOf[subschema #4: MoneyMarketFund]/icon_url` to the response with the `201` status
  - added the optional property `instrument/oneOf[subschema #5: AMC]/icon_url` to the response with the `201` status
  - added the optional property `instrument/oneOf[subschema #6: ETF]/icon_url` to the response with the `201` status
  - added the optional property `trades/items/instrument/oneOf[subschema #1: Bill]/icon_url` to the response with the `201` status
  - added the optional property `trades/items/instrument/oneOf[subschema #2: CurrencyPair]/icon_url` to the response with the `201` status
  - added the optional property `trades/items/instrument/oneOf[subschema #3: Bond]/icon_url` to the response with the `201` status
  - added the optional property `trades/items/instrument/oneOf[subschema #4: MoneyMarketFund]/icon_url` to the response with the `201` status
  - added the optional property `trades/items/instrument/oneOf[subschema #5: AMC]/icon_url` to the response with the `201` status
  - added the optional property `trades/items/instrument/oneOf[subschema #6: ETF]/icon_url` to the response with the `201` status
- **2026-07-17** `8e8a8242f1f2` — 3 breaking, 11 info
  - the `trades/items/notional_currency` response's property type changed from `string` to no type for status `201`
  - the `trades/items/side` response's property type changed from `string` to no type for status `201`
  - the `trades/items/status` response's property type changed from `string` to no type for status `201`
  - added `#/components/schemas/Currency` to the `trades/items/notional_currency` response property `allOf` list for the response status `201`
  - added `#/components/schemas/OrderSide` to the `trades/items/side` response property `allOf` list for the response status `201`
  - added `#/components/schemas/OrderTradeStatus` to the `trades/items/status` response property `allOf` list for the response status `201`
  - removed the `EUR` enum value from the `trades/items/notional_currency` response property for the response status `201`
  - removed the `GBP` enum value from the `trades/items/notional_currency` response property for the response status `201`
  - removed the `USD` enum value from the `trades/items/notional_currency` response property for the response status `201`
  - removed the `buy` enum value from the `trades/items/side` response property for the response status `201`
  - removed the `executed` enum value from the `trades/items/status` response property for the response status `201`
  - removed the `pending` enum value from the `status/allOf[subschema #1: OrderStatus]/` response property for the response status `201`
  - removed the `sell` enum value from the `trades/items/side` response property for the response status `201`
  - removed the `settled` enum value from the `trades/items/status` response property for the response status `201`
- **2026-07-13** `03da9bc8e86b` — 1 info
  - api tag `trading` added

---

[Operation](https://skmtc.dev/joinsophic/apis/sophic-engine-api/docs/accounts/:account_id/orders/post.md) · [API](https://skmtc.dev/joinsophic/apis/sophic-engine-api.md) · [Page](https://skmtc.dev/joinsophic/apis/sophic-engine-api/changes/accounts/:account_id/orders/post)