Sending custom field info via api

[Pav]

Hi Andy, the question here is are you using REST (I guess it is this one) or XML-RPC to communicate with the API?

For REST, you can use this API call to retrieve the Contact Custom Fields to see the Id numbers.
https://developer.keap.com/docs/rest/#operation/retrieveContactModelUsingGET

And example of sending custom fields is given in this discussion here:

Update Contact Custom Field

I am trying to use the REST API to update a custom field for a contact. I have looked up the database name from Admin->Settings (customField) and have read that there needs to be an underscore preceding the database name (_customField). The data type for my field is text. Here is the request I am sending to PATCH “https://api.infusionsoft.com/crm/rest/v1/contacts/userId?access_token=access_token” (userID and access_token values replaced of course) custom_fields: [ { content: ‘test’, id: ‘_…

For XML-RPC, you would have to prefix the custom field name with the underscore, but there is no Id Number.