# Custom Fields

[Custom fields in the product knowledge base](https://alteg.io/en/support/knowledge-base/4858681446941-additional-fields/)


Additional custom field definitions for extending entity data structures.


## Getting a collection of location fields

 - [GET /v1/custom_fields/{field_category}/{location_id}](https://developer.alteg.io/en/custom-fields/get_custom_field_list.md)

## Adding a Custom Field

 - [POST /v1/custom_fields/{field_category}/{location_id}](https://developer.alteg.io/en/custom-fields/create_custom_field.md): To add a field, the user must be part of the Chain associated with the location and have the appropriate access rights in the following section: Settings → Access → Custom Fields → Create custom fields

## Update a Custom Field

 - [PUT /v1/custom_fields/{field_category}/{location_id}/{field_id}](https://developer.alteg.io/en/custom-fields/update_custom_field.md): To update a field, the user must be part of the Chain associated with the location and have the appropriate access rights in the following section Settings → Access → Custom Fields → Modify custom fields

## Remove a Custom Field from a Location

 - [DELETE /v1/custom_fields/{field_category}/{location_id}/{field_id}](https://developer.alteg.io/en/custom-fields/delete_custom_field.md): To remove a field, the user must be part of the Chain associated with the location and have the appropriate access rights in the following section: Settings → Access → Custom Fields → Remove custom fields