Fields and tags
Custom contact fields and the tags that organize contacts.
GETList custom fieldsList custom fieldsPOSTCreate a custom fieldA new field for contacts. key and type cannot change later. The select and multiselect types require options; the others do not accept them.PATCHEdit a custom fieldChanges the label, the options (the whole list is replaced), the position, or archives the field. An archived field no longer accepts values.DELDelete a custom fieldDeletes the field and its value on every contact. There is no undo, which is why it requires confirm=true.GETList contact tagsList contact tagsPOSTCreate a contact tagAn API key limited to some numbers gets 403: this operation covers the whole base.POSTApply a tag in bulkAdds or removes a tag on many contacts at once: by a list of ids (up to 1,000) or by the same filters as GET /contacts — one or the other. affected counts…PATCHEdit a contact tagAn API key limited to some numbers gets 403: this operation covers the whole base.DELDelete a contact tagDeletes the tag and removes it from every contact.