---
title: "Contact — qr3.app"
description: "How to reach qr3.app: email, postal address of the operating company, and where to look first for technical questions."
canonical: "https://qr3.app/en/contact/"
lang: "en"
---

# Contact — qr3.app

> How to reach qr3.app: email, postal address of the operating company, and where to look first for technical questions.

Canonical: <https://qr3.app/en/contact/>

Contact

# Contact qr3.app

One address, read by a person. No ticket system, no contact form.

## Email

[office@qr3.app](mailto:office@qr3.app)

We answer in German and English.

## Operating company

**Ostheimer OG**
Fabriksgasse 20
2230 Gänserndorf

Austria

[Imprint](/en/legal/imprint/)

## Technical questions

For API, SDK and Digital Product Passport questions the documentation is usually faster than an email — it covers authentication, endpoints, error codes and rate limits.

- [Docs](https://docs.qr3.app/en/)
- [Status](https://qr3.app/v1/status)