# hidden on POST /api/v1/orders* stops working

Calls to POST /api/v1/orders*, body parameter hidden on KuCoin Futures API stopped working on August 3, 2026.

- API: KuCoin Futures API (api-futures.kucoin.com)
- Kind: Endpoint removal
- Announced: August 3, 2026
- Takes effect: August 3, 2026
- Calls after that day: fail
- Calls it hits: `POST /api/v1/orders*`, `body parameter hidden`
- Source: [Announcement](https://www.kucoin.com/docs-new/change-log)
- Page: https://www.okapi.bot/providers/kucoin-futures-api/breaking-changes/hidden-on-post-api-v1-orders-stops-working/

## What to use instead

Stop sending hidden, iceberg and visibleSize on futures orders (POST /api/v1/orders and its test and batch variants); KuCoin rejects them with error 400413.

## KuCoin Futures API's words

> No longer supports the hidden, iceberg and visibleSize parameters.