Data and API

The index series, event ledger and latest reading are open data. Download them or use the API.

Downloads

File	Contents
`latest.json`	The latest confirmed reading: value, band, warning level, changes, pillars and strongest signals (JSON).
`daily_realtime.csv`	Real-time daily series over five years (the headline).
`daily_revised.csv`	Revised daily series for analysis.
`sensitivity.csv`	Sensitivity analysis: 90% interval and band agreement per day.
`events.csv`	The event ledger as is, including revision rows.
`states.csv`	The state-variable change log.
`events.json`	Events with Finnish titles, current effect and revision history (JSON).

The real-time series uses on each day only information that was public then, which is why it is the headline. The revised series dates events to when they actually happened. Times are Finnish time.

Open API

The public endpoints are free and need no key. They are cached for up to a minute. The limit is 60 requests per minute per IP address; the static files are the preferred way.

Endpoint	Contents
`GET /data/latest.json`	The latest confirmed reading (static, updated on publication).
`GET /api/v1/status`	Service status: mode, last run and fast scan.
`GET /api/v1/readings?from=&to=`	Daily readings for a date range.
`GET /api/v1/events?pillar=&type=&from=`	Events filtered by pillar, type and date.

A real-time API with interim updates and briefings is part of the Business plan: For business and organisations

Licence

The index series and event ledger are published under Creative Commons Attribution 4.0 (CC BY 4.0). You may use, share and adapt the data, also commercially, as long as you credit the source. Premium briefings are not part of the open data.

How to cite

Finland War-State Index (FWSI), model v1.1.0. https://sotatila.fi/en/ (retrieved 24 Oct 2026). CC BY 4.0.