How to add custom field values to contact

API Q&A
28

@Vinod_Rath I would recommend using the REST API to work with custom fields for Contacts.

Use GET /contactCustomFields to view the custom fields that you have configured.
Use PATCH /contacts/{contactId} to update a Contact with values for the custom fields you want.

The body of the PATCH /contacts/{contactId} request might be something like:

"custom_fields": [
 {
  "id": 2,
  "content": "B0018ZW7CA"
 },
 {
  "id": 0,
  "content": "2017-04-28T14:33:00-0700"
 }
]
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