---
title: Release candidate 1.0.0-rc.1
type: changelog
date: 2026-11-12
description: "The first release candidate of Accquix Register: demo mode, overload protection, tests on managed PostgreSQL, AI agents. Contracts frozen for 1.0.0."
changelog:
  category: Release candidate
---

The first release with an image and a frozen contract. Between this candidate and 1.0.0, the API, the MCP tools,
the command line and the configuration change only to fix a defect. See [Versions and stability](/api/stability).

- **Demo mode**: the real API over 180 fictional subjects in seconds, with nothing to download.
  See [Try the demo](/quickstart#try-the-demo).
- **Overload protection**: an instance at its capacity keeps answering and refuses the excess at once with `503`
  and `reason: overloaded`. The API's connection pool now defaults to 10 connections.
- **Tested on managed PostgreSQL**: compatibility and capacity on PlanetScale Postgres with the real data. See
  [PlanetScale Postgres](/self-hosting/planetscale).
- **AI agents**: the read-only MCP endpoint, and copyable prompts for running and integrating the register.
- **Full addresses** on every search result, by name or by identifier.
- **Safer operations**: `serve` refuses to start on an outdated schema; list items without any identifier are left
  out and counted instead of blocking a list, up to a cap that follows each list's size.
- **Limits you set**: API keys have no rate limit by default, because an instance usually serves one application;
  set one when several share it. Anonymous callers stay limited per client IP.
- **Taxpayers without an IČO for invoices**: their exact DIČ, in the lookup or the search box, gives the name and the
  address the Financial Administration publishes.
- **Taxpayer name search, if you turn it on**: taxpayers without an IČO by their full name only, with their own limit,
  and an objection by DIČ for anyone who asks to be left out.

The last check before 1.0.0 is the first monthly reconcile against a new RPO snapshot, around 5 December 2026.
The full list is in `CHANGELOG.md` in the repository.