Madaster is the cadastre for materials. Raw materials are scarce but limited and must therefore be well documented so that they remain unlimited. With the help of the material passport, materials get an identity, which means that they can never disappear in anonymity as waste. Madaster acts as a library and generator for material passports. An independent platform accessible to all: individuals, businesses and governments. Madaster is being developed under the supervision of the Madaster Foundation.