@nor-data/statfin-mcp

@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

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

Develop

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