Volton Public Data API
Estonian electricity-market data as JSON. No key, CC-BY-4.0. Our pipeline reads Elering, Nord Pool, ENTSO-E and the Baltic Transparency Dashboard, normalises the shapes, and refreshes once an hour.
curl https://public-data.volton.energy/v1/day-ahead-spot/latest.jsonDeveloper portal
Per-dataset pages, code samples (curl, DuckDB, Python, R, Excel Power Query) and an interactive OpenAPI 3.1 reference live at public-data.volton.energy.