To improve the interoperability of the cheminfo ELN with other services and tools we are currently migrating the data schema of the cheminfo ELN to JSON-schema (via TypeScript types, github.com/cheminfo/ cheminfo-types), which would allow us to programmatically validate requests to the ELN. In addition, we are also implementing a REST API for AiiDAlab which would also enable ELNs, and other services, to send data to and request data from the AiiDAlab. Clearly, our work highlights the need for a collective effort from the community of ELN developers for the development of a standardised API specification, comparable to OPTIMADE , for standardised access to data across simulation and experimental databases.