---
title: "Contact Custom Field Definitions"
slug: "contact-custom-field-definitions"
updated: 2025-10-24T22:00:43Z
published: 2025-10-24T22:07:47Z
canonical: "guide.youraspire.com/contact-custom-field-definitions"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.youraspire.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Contact Custom Field Definitions

## **Description**

Defines custom fields available for contacts, including field type, name, and any custom list values.

## Resource Overview

| **Endpoint** | **Definition** |
| --- | --- |
| GET/ContactCustomFieldDefinitions | Retrieve contact custom field definitions. |

## Attributes

| Attribute | Description | Data Type | Notes |
| --- | --- | --- | --- |
| ContactCustomFieldDefinitionID | Unique identifier | integer |  |
| ColumnName | Field name | string | Max length: 100, Nullable |
| ColumnType | Field type | string | Max length: 100, Nullable |
| CustomList | List of allowed values | string[] | Nullable |
| DateCreated | Creation date | datetime |  |
| CreatedByUserID | ID of creator | integer | Nullable |
| CreatedByUserName | Name of creator | string | Max length: 101, Nullable |
| DisplayOrder | Display order | integer |  |