Credentify is an API service in the cloud that enables universities and students to issue and receive micro-credentials that can be stacked into ECTS. This Erasmus+ funded project is already integrated into an open education video platform and piloted by four European universities to create new educational experiences. It is based on blockchain technologies and offers tools for developers and researchers. Credentify is the first European free and open credentials service to use European blockchain conventions for educational content, which immensely improves transfer and transparency of credentials. The website gives information on the product and provides case studies.