Archives a contact property. The key stops being accepted in contact writes and stops rendering in templates, but every value already stored on your contacts is preserved and still returned when you read a contact. The key stays reserved and still counts toward the workspace's 200-property limit, so it cannot be re-created with a different type. Archiving an already-archived property returns a conflict error; reverse it with [Unarchive a contact property](/docs/api/reference/unarchive-contact-property). ID of the contact property to archive (`prp_`-prefixed). ID of the property (`prp_`-prefixed), accepted by every operation that takes a `property_id`. The property key, used as the key in contact data and as the template variable name in broadcasts. Lowercase letters, digits, and underscores, starting with a letter. Cannot be changed after creation. The value type every contact must use for this property. Cannot be changed after creation. Possible values: `string`, `number`, `boolean` Default used when a contact has no value for this property and the template does not supply an inline fallback. A string, number, or boolean matching the declared type (strings up to 500 characters), or null when no fallback is set. Whether the property is archived. An archived property is rejected in new contact writes and stops rendering in templates, but every value already stored on contacts is preserved. Reactivate it with unarchive.