With the introduction of 15-minute MTU, the official output from Euphemia consists of 15-minute clearing prices. Official prices from the Market Data API are provided in 15-minute intervals. However, additional API endpoints have been introduced to offer new price and system price indices in 60-minute and 30-minute intervals for users who need them.
Similarly, a new indices page is available on the public Nord Pool market data page and in the Data Portal where these other granularities will be published.