How to identify custom fields of contact using Rest API?

Hi Team ,

I used Properties api to get all properties of contact . But I didn’t found any flag to identify custom fields in the response . Can you guide me to get contact custom fields using rest api?

Sample Response of custom field :

 [{ 
 "name":"custom_phone",
 "label":"custom_phone",
 "description":"",
 "groupName":"contactinformation",
 "type":"number",
 "fieldType":"number",
 "deleted":false,
 "currencyPropertyName":null,
 "createdAt":1565589968997,
 "formField":true,
 "displayOrder":-1,
 "readOnlyValue":false,
 "readOnlyDefinition":false,
 "mutableDefinitionNotDeletable":false,
 "favorited":false,
 "favoritedOrder":-1,
 "calculated":false,
 "externalOptions":false,
 "displayMode":"current_value",
 "showCurrencySymbol":false,
 "hubspotDefined":null,
 "hidden":false,
 "updatedAt":1565589968997,
 "referencedObjectType":null,
 "hasUniqueValue":false,
 "createdUserId":7643155,
 "searchableInGlobalSearch":false,
 "optionSortStrategy":null,
 "isCustomizedDefault":false,
 "searchTextAnalysisMode":null,
 "optionsAreMutable":null,
 "textDisplayHint":null,
 "numberDisplayHint":"formatted",
 "updatedUserId":7643155,
 "options":[ 

 ]
 },.....

Hello @ArunrajManrajan

I know it would not ease your task but can help you. Please have a look to THREAD. There is shared a list of contact properties that are default for a account. So in your codebase you can filter out which are default and custom.

Thanks