Update Contact Property

PATCH

https://reloop.sh/api/contacts/v1/properties/:contact_property_id

Path Parameters

contact_property_idstringRequired

Property ID to update

Body Parameters

fallbackValuestringnullRequired

import { Reloop } from "reloop-email";

const reloop = new Reloop({ apiKey: "rl_123456789" });

const { response: property, error } = await reloop.contacts.updateProperty("prop_123456789", {
  fallbackValue: "N/A",
});
if (error) throw error;

{
  "object": "contact_property",
  "id": "con_123456789",
  "propertyName": "company",
  "propertyType": "example_propertyType",
  "defaultValue": null,
  "createdAt": "2026-03-23T10:00:00.000Z",
  "updatedAt": "2026-03-23T10:00:00.000Z",
  "event": "evt_123456789"
}