Building the digital infrastructure for Fab Cities

the digital infrastructure for Fab Cities


Our vision is to promote a green, resilient, and digitally-based mode of production and consumption that enables the greatest possible sovereignty, empowerment and participation of citizens all over the world.
We want to help Fab Cities to produce everything they consume by 2054 on the basis of collaboratively developed and globally shared data in the commons.


The need to reorganize globalized value creation and production systems and to establish sustainable and synergetic production processes worldwide is the starting point for the INTERFACER project. The goal is the development, initial application and distribution of an open source software system called Fab City OS (OS = Operating System) which can be implemented as a software stack along the value chain at the respective entities of the global network, e.g. Fab Cities, Fab Labs to build up and run a local and yet globally connected value creation system.

Key Principles

We strongly believe in the power of Open Source and thus apply corresponding licensing regimes to all of our software and hardware developments and applications. As a result, a digital commons is created - a public, non-exclusive good. Another key concept is federation in the sense that we build a digital infrastructure that can be hosted individually and independently by a Fab City while being able to connect and exchange data with other Fab Cities. Finally, we make use of distributed ledger technologies (DLTs) and crypto functions to enable secure transactions among the network.


the future of making conferences and expo keyvisual


the future of making

That was the #tfom23 in Hamburg! Talks, Workshops and Exhibitions on local circular and globally connected cities.

the future of making conferences and expo keyvisual

the future of making


The exhibition offers a compilation 30 exhibits from three series featuring Hamburg citizens, makers, scientists, innovators, pupils & students together with local artisans and FabLabs.

Abstract image

Digital Infrastructure

Fab City OS

Join the innovative federated open source platform to share and collaborate on Open Source Hardware projects.

Build Workshop Hamburg Impressions


Build Workshops

Die kostenfreie Workshop-Serie für Hamburger Maker

Open Source Hardware Ecosystem Header Image

IF Project Outcome

The Open Source Hardware Ecosystem

Create a software ecosystem for Open Source Hardware.

Social Media Sharepic for the Maker Challenge Hamburg

Idea Competition

Fab City Maker Challenge Hamburg

Your Idea. Made in Hamburg.

A group of young people in their office in discussion working on their computers

Research & Development


Here you find a selection of the INTERFACER project results and outcomes.

Digital Product Passport

The DPP comprises two dimensions: Tracking and tracing of material and (design) data flows. More about the DPP implementation for Open Source Hardware here.

Fab City OS Core

A digital infrastructure upon which an economy of Fab Cities and Regions will unfold. For more information, please read the blog article or visit the follow-up website via

Fab City OS Suite

Find all the digital tools you need to set up and run a Fab City in one kit to be installed on your local server. More about Fab City OS Suite and repository links here.

Fab City Index

Testing and reviewing a method to evaluate and monitor the circularity status of a Fab City. Read the full article here.

Green Paper

In collaboration with city administrators and policy makers, we elaborate a technological and economic framework for Fab City OS. Read the paper here.

Open Toolchain Foundation

Promoting and supporting the advancement of open source software needed to develop open source hardware. Visit the foundation website.

OS Hardware Manufacturing

Building an innovation community for local produced prototypes and products. Read more here.

Fab City Micro Factory

Conceptualizing and testing how local manufacturing can be realized in a highly modular and flexible microfactory. Read more here.

Maker Challenge

Your Idea. Made in Hamburg. The idea competition aimed for social, sustainable or innovative products that could be manufactured locally in the Fab City Hamburg. Read more here.

Build Workshops

Building for all. A three-month workshop series with more than 50 workshops and over 220 prototypes. Read more here.


FabAccess provides a resource access control system, enabling e.g. Fab Labs to deny or allow access to the machines and tools in the labs only to authorized persons. Find full documentation on Gitlab.

Project repositories

All INTERFACER project outcomes are fully documented via Git Respositories.


We regard ourselves as part of a global community of like-minded people with the same mission. Learn here about our network of partners and related projects.

  • Partner Network
  • Related Projects

Fab City Global Initiative

is a global initiative for productive, resilient, open cities. A collective of civic leaders, makers, urbanists and innovators working on shifting the industrial urban paradigm to one that better supports life on Earth. FCGI

Laboratory of Production Engineering

The Laboratory of Production Engineering (LaFT) is part of the Faculty of Mechanical Engineering at Helmut Schmidt University (HSU), University of the Federal Armed Forces Hamburg. In close cooperation with research and industrial partners, basic principles, innovative approaches and methods are researched and developed within the four areas of microproduction, robotics and automation, value creation systems and new technologies and materials. LaFT


As a think tank for the future of value creation and production, the experts of the New Production Institute (NPI) are involved in various projects dealing with the change of value creation systems against the background of new possibilities of networking and production in times of digital transformation. NPI

Open Source Ecology Germany e.V.

develops technologies to build a local economy, from tractors to wind turbines to cars, continuously improving them according to sustainable core values such as reproducibility, modularity, suitability for self-build and ecological design, and making the results available to everyone in open source. OSEG

Verbund offener Werkstätten

is an association of open workshops that wants to encourage DIY and show how important and necessary third places are for local economies and learning. In doing so, they critically engage with processes, materials and technologies. VoW

is a scientific centre supported by universities of the Bundeswehr and part of the Federal Government’s economic stimulus programme to overcome the COVID 19 crisis. The funds are used to finance research projects and projects for knowledge and technology transfer (in particular to promote start-ups).


is a research project focused on industrial historical sites undergoing transformation. Leveraging the potential of underutilized historic spaces to become creative production and manufacturing hubs, the project envisions sustainable and inclusive futures for the city and its residents. Centrinno

Fab City Foundation

The Fab City Foundation supports the global initiative through the development of projects and educational programs that are focused on building the capacity of cities and their communities. Based in e-Estonia, the Foundation is location independent and supports distributed programs and projects the world over. FCF


The REFLOW Project aims to develop circular and regenerative cities through enabling active citizen involvement and systemic change to re-think the current approach to material flows in cities. The project utilizes Fab Labs and maker spaces as catalysts for change in urban and peri-urban environments. Reflow


Stay in contact via the Fab City Hamburg Newsletter

We care about the protection of your data. Read our Privacy Policy.





Follow us


© 2023 INTERFACER, All rights reserved.