PXWEB is a common web API used by many European Statistical agencies to disseminate official statistics. The pxweb package facilitates connections and usage of these APIs.
References
The decription of the PXWEB API here: https://www.scb.se/en/About-us/about-the-website-and-terms-of-use/open-data-api/ The official home page of PXWEB can be found here: https://www.scb.se/en/services/statistical-programs-for-px-files/px-web/