---
title: "Prepare for sponsor categories, scanning questions and registrant QR updates"
description: "Updated guides for the Core API deployment planned for 9 October 2026."
type: changelog
date: "2026-10-09"
changelog:
  category: Documentation
---

These guides describe the Core API update scheduled for production on **9 October 2026**. Documentation is being published ahead of the backend deployment; availability has not yet been confirmed. Check with Brella before relying on the changes in your production integration.

The upcoming update adds event-level sponsor setup and lead-scanning configuration:

- [Sponsor categories](https://docs.brella.io/reference/sponsor-categories): read, create, update and delete categories, with external IDs, display order and booth-meeting settings. Category deletion also removes its sponsors.
- [Scanning questions](https://docs.brella.io/reference/scanning-questions): read, create, update and delete sponsor-owned lead questions. Choice questions support up to 50 non-empty string options, each up to 1,000 characters. Question deletion also removes collected answers.
- [Speakers](https://docs.brella.io/reference/speakers#deleting-a-speaker): DELETE is available with the scope's delete action. The speaker becomes unavailable immediately and related cleanup is scheduled after commit.
- [Registrant QR values](https://docs.brella.io/reference/registrants#external-and-internal-qr-values): configure `external_qr_string` on create or update, including joined registrants. Read the effective `external-qr-string` and stable `internal-qr-string` separately. Overrides are unique within an event and cannot use internal Brella QR formats.

**Networking-timeslot input change:** remove `registrant_list_ids` and `rating_registrant_list_ids` from [networking-timeslot requests](https://docs.brella.io/cookbook/networking-timeslots) and scope mappings. These inputs are unsupported and ignored. Configure event access separately.

The new resources require their own enabled token scopes. Grant only the actions, events, fields and filters your integration needs. See the cookbook examples for [categories](https://docs.brella.io/cookbook/sponsor-categories) and [questions](https://docs.brella.io/cookbook/scanning-questions).