# iceberg on POST /api/v3/hf/margin/order* stops working

Calls to POST /api/v3/hf/margin/order*, body parameter iceberg on KuCoin API stopped working on August 3, 2026.

- API: KuCoin API (api.kucoin.com)
- Kind: Endpoint removal
- Announced: August 3, 2026
- Takes effect: August 3, 2026
- Calls after that day: fail
- Calls it hits: `POST /api/v3/hf/margin/order*`, `body parameter iceberg`
- Source: [Announcement](https://www.kucoin.com/docs-new/change-log)
- Page: https://www.okapi.bot/providers/kucoin-api/breaking-changes/iceberg-on-post-api-v3-hf-margin-order-stops-working/

## What to use instead

Stop sending hidden, iceberg and visibleSize on margin orders (POST /api/v3/hf/margin/order and its test variant); KuCoin rejects them with error 400413.

## KuCoin API's words

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