# About 

### About `custom_fields`
Read responses (`GET /suppliers`, `GET /suppliers/{supplier_id}`) return
`custom_fields` keyed by the field's display **label** — the same label you
see in the Mercura admin UI — rather than the internal column id. Columns
with no active definition are omitted, and on a label collision the column
defined first (by display order, then creation time) wins. On the **write**
path (`POST /suppliers`) send `custom_fields` keyed by the internal column
**id**; only reads are label-keyed.

Version: 1.79.2

## Description:

  - `About custom_fields` ()
    Read responses (`GET /suppliers`, `GET /suppliers/{supplier_id}`) return
`custom_fields` keyed by the field's display **label** — the same label you
see in the Mercura admin UI — rather than the internal column id. Columns
with no active definition are omitted, and on a label collision the column
defined first (by display order, then creation time) wins. On the **write**
path (`POST /suppliers`) send `custom_fields` keyed by the internal column
**id**; only reads are label-keyed.