Open APIs Löydä kaikki pääkaupunkiseudun avoimet rajapinnat täältä! Submit Last Created Popular Relevance Name Ascending Name Descending Last Modified Go 2 datasets found Helsinki metropolitan area Service Map APIs The Service Map is an open information channel on the service points and services offered by the cities of Helsinki, Espoo, Vantaa and Kauniainen. The Service Map helps the... JSON WFS Helmet-libraries’ catalog Data from the HelMet libraries’ catalogue in a machine-readable format. The data source contains the descriptions of approximately 680,000 books, records, sheet music... JSON