> For the complete documentation index, see [llms.txt](https://experience-crm.gitbook.io/experience-crm-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://experience-crm.gitbook.io/experience-crm-api/guests/guest-custom-fields.md).

# Guest custom fields

### Introduction 

In Experience CRM, there are 2 types of custom fields : 

* Customer custom fields
  * These fields are related to a guest
* Stay custom fields 
  * These fields are related to a reservation

With this API, you can view all existing Custom fields for a guest, and modify existing customs fields.

Each property can have its own custom fields. Therefore, we cannot give you a list of fields and their definitions. 

#### Available in this API:

{% content-ref url="/pages/BbcM9BWSQtTyR7fGmSRZ" %}
[Get customs fields for a guest](/experience-crm-api/guests/guest-custom-fields/get-customs-fields-for-a-guest.md)
{% endcontent-ref %}

{% content-ref url="/pages/M9SCQLMBJMXzPaCeR8Oj" %}
[Modify Customs fields for a guest](/experience-crm-api/guests/guest-custom-fields/modify-customs-fields-for-a-guest.md)
{% endcontent-ref %}