JSON (en)
URL: https://data.snb.ch/api/cube/frekgbgpaq/data/json/en
JSON with descriptions in English.
Query last update time: https://data.snb.ch/api/cube/frekgbgpaq/lastUpdate
Footnotes and series breaks are not available via API, but can be viewed here: https://data.snb.ch/en/topics/uvo/cube/frekgbgpaq
Questions and Answers about the API: https://data.snb.ch/en/help_api