Open APIs

Löydä kaikki pääkaupunkiseudun avoimet rajapinnat täältä!

• Linked Events Helsinki API

  You can use Helsinki’s Linked Events API to retrieve event data of several City of Helsinki divisions and the Helmet library service in a uniform format. The geographic data is...

  • JSON

• Helsinki region statistics API

  The regional statistics interface enables the computerised retrieval of statistical data in Greater Helsinki’s Aluesarjat (in Finnish) statistical database in different file...

  • JSON
  • PXWEB

• Helsinki Metropolitan Area service register REST API

  Helsinki Metropolitan Area (Helsinki, Espoo, Vantaa and Kauniainen) service register REST API. The interface offers possibilities to make queries and use the data in the...

  • XML
  • JSON

• Espoo.fi-web service open API

  Note! Espoo.fi website's old APIs was removed from use starting 1.9.2021. New API will be documented in 2022. Meanwhile, events in Espoo can be queried through Linked Events...

  • XML
  • JSON

• The Issue Reporting API of the City of Helsinki

  NOTE: The API is currently not in use due to renewal of the information system. The renewed API is scheduled to be published in 2024. An API to the City of Helsinki digital...

  • XML
  • JSON

• Open decision API of Helsinki

  Note (12/2023): OpenAhjo is not in production, so the up-to-dateness or availability of its data cannot be guaranteed. You can search for public decision data for the City of...

  • XML
  • JSON

• Metadata of HRI datasets

  The dataset includes the metadata of all open data found in the Helsinki Region Infoshare (HRI) online service for open data. The metadata can be read through the CKAN data...

  • JSON

• Traffic data from Helsinki

  Traffic data from Helsinki contains data about motor traffic: traffic volume, speed, amounts of different types of vehicles). The data consists of three different datasets in...

  • JSON
  • CSV
  • WMS
  • WFS

• 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

• Helsinki environmental statistics

  Helsinki Environmental Statistics is an online statistics service collecting the essential variables describing the state of the environment and burdens on the environment in...

  • PXWEB
  • JSON

• Helsinki Channel open data

  Helsinki Channel’s (helsinkikanava.fi) videos and metadata are available through an open programming interface. The Helsinki Channel provides webcasts and publishes recordings...

  • JSON

• 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