@nor-data/statfin-mcp

MCP server for official statistics from Statistics Finland (Tilastokeskus) — the StatFin database, exposed through the PxWeb API. Search 3000+ tables, inspect their dimensions, and pull data as JSON-stat2. No API key required.

Part of the nor-data family of Nordic open-data MCP servers. Built on the same pattern as the SSB (Norway) server — StatFin and SSB both speak PxWeb, so the tools mirror each other.

Tools

Tool	What it does
`sok_tabell`	Keyword search across all StatFin tables. PxWeb has no server-side search, so this matches a bundled index (built from the full table tree) locally and returns the most relevant tables with their `tabell_id`.
`hent_tabell`	Metadata for a table: title + dimensions (variables) with their valid value codes and labels. Read this first to learn which filter codes exist.
`hent_data`	Fetch actual values as JSON-stat2, filtered by a flat `{variabelkode: [verdier]}` map. Supports special selections like `{filter:'top', values:['1']}` for the latest period.
`list_emner`	List the ~140 StatFin subject areas (e.g. `vaerak` = Population structure). Scope a search or browse when a keyword misses.

All tools accept an optional lang (en default, fi, sv). Variable codes are language-independent; only titles/labels are localised.

Example agent flow

sok_tabell({ query: "population by region" }) → tabell_id: "vaerak/statfin_vaerak_pxt_11ra.px"
hent_tabell({ tabell_id }) → sees variables Alue (area), Vuosi (year), Tiedot (info)
hent_data({ tabell_id, filtre: { Alue: ["SSS"], Vuosi: { filter: "top", values: ["1"] } } }) → latest national figures as JSON-stat2

Install

jsonc

// Claude Desktop / Claude Code MCP config
{
  "mcpServers": {
    "statfin": {
      "command": "npx",
      "args": ["-y", "@nor-data/statfin-mcp"]
    }
  }
}

Develop

Terminal

npm install
npm run build-index   # crawl the StatFin tree → data/tables-index.json (~1–2 min)
npm run dev           # run from source via tsx
npm run build         # compile to dist/

The search index is bundled in the package (data/tables-index.json). Re-run npm run build-index to refresh it (nightly is plenty — StatFin updates tables, not the tree, frequently).

Notes & limits

PxWeb allows 30 calls / 10 s and rejects queries over ~100 000 cells (HTTP 403) — keep hent_data selections small (few regions × few years).
A few subjects (vtp, kivih, sekn, akay) return HTTP 400 server-side and are skipped during indexing; this is a StatFin quirk, not a bug here. The index records them under skipped.
Data licensed under CC BY 4.0 by Statistics Finland.

License

MIT