The DS Metadata Broker Service is a comprehensive connector that provides the necessary interfaces for communicating with any other Data Spaces connector. More specifically, it is capable of handling messages from Data Space connectors, indicating a status update, such as new data being available. Self-descripting metadata of connectors are automatically indexed and can be optionally restricted by means of usage control policies. Search functionality encompasses a full-text search, filter options based on the International Data Spaces information model, and full queries using SPARQL, the standardized query language in the semantic web. Human user friendly access is granted via a web interface.