Your API key (required)

The contact's id (required)

The tag UUID (required if not sending tag_ids). IMPORTANT: this field expects the tag UUID, not the tag name. The UUID can be found in the URL when editing a tag on our app.

The tag UUIDs (required if not sending tag_id). If needed you can also submit multiple tag UUIDs separated by comma via this field. It's either tag_id or tag_ids. If you're submitting tag_ids leave tag_id blank.