This component is part of the SDMX RI and is responsible for exposing the data and structural metadata using a Web Service interface that provides SDMX-ML messages. The interface follows the guidelines of the SDMX v2.0 standard for Web Services and the web service guidelines for SDMX v2.1 standard. As regards the data dissemination, the web service provider concerns the dynamic pull scenario. It represents the wrapper of the structure and data retrieval functionality in a web service. It also co-ordinates how building blocks are going to be used in order to produce the response. It is also responsible for reading all the parameters from the configuration files and passing them to the other building blocks. For authentication it uses the NSI Auth Module.