Nimistu — Estonian Business Register README
The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the Nimistu — Estonian Business Register listing page.
nimistu MCP — Estonian Business Register for AI assistants
Connect any MCP-compatible AI assistant (Claude, Cursor, ChatGPT, and more) to the Estonian Business Register (Äriregister) and related open data. Ask about any Estonian company, person, trademark, or activity sector in plain language — free, no API key, read-only — with every answer traceable to its source.
Powered by nimistu.ee, a free, ad-free public register that aggregates 60+ official Estonian open-data sources, each field carrying its source and last-update date.
- Endpoint (Streamable HTTP):
https://nimistu.ee/api/mcp - Free — no API key, no signup, read-only
- Bilingual — Estonian and English
- Traceable — every answer is source- and date-stamped
Quick start
Claude Code
Cursor
Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project):
Claude Desktop and other clients
Stdio-only clients can bridge via mcp-remote:
Transports: Streamable HTTP at https://nimistu.ee/api/mcp (recommended) · SSE at
https://nimistu.ee/api/sse.
What you can ask
You talk to it in natural language — you don't need to know table names or tool details.
- Tell me about an Estonian OÜ — owners, board, financials
- Which companies is a given person connected to?
- What happened in the Estonian Business Register today?
- Top 10 taxpayers and employers in Estonia
- Find trademarks containing a word — and who owns them
- How many retail companies (EMTAK 47.8) are there, and where?
- Compare the 2024 financials of three companies
Capabilities
Ten tools over the full nimistu.ee dataset:
| Capability | What it covers |
|---|---|
| Company profile | status, address, activity (EMTAK), VAT, employees, financials, tax debt, board (with appointment dates), owners, trademarks |
| Annual reports | every filed majandusaasta aruanne: revenue, profit, employees, equity, assets, liabilities, labour cost, plus computed ratios and the EMTAK sector median |
| Ownership structure | subsidiaries, associates, foreign parent, group structure |
| Person & connections | a person's current and former ties to Estonian companies (board, shareholder, representative) |
| Fresh registry events | what changed in the Estonian Business Register today |
| Rankings | curated top lists — taxpayers, employers, procurement winners, MPs in business, and more |
| Trademark search | EUIPO trademarks by text, with their owners |
| Sector lookup | companies by EMTAK activity code, with counts and locations |
| EMTAK classification | resolve and explain Estonian activity codes |
What it does not cover
Worth knowing before you rely on a negative answer:
- Registry entry history. Company profiles are current state only — no kanded, no määrused, no pending menetlused. An answer about a company is about today, and will not mention an ongoing proceeding.
- Beneficial owners. Estonia's FIU withdrew public access to the beneficial owner register on 10 July 2026 following the CJEU ruling, so this server no longer returns them.
- Court decisions and public-authority documents. Separate corpora, served by lahend.ee and dokumendiregister.ee respectively.
- Real-time data. Sources refresh on their own cadences, mostly nightly.
get_companyreturnsdataAsOfso you can see how stale an answer is rather than having to assume.
Data sources and attribution
nimistu aggregates 60+ official sources — Äriregister (RIK), the Estonian Tax and Customs Board (EMTA), EUIPO, public-procurement registers, sanctions lists, and more. Each field shows its source and last-update date.
- Sources: https://nimistu.ee/allikad
- Usage terms: https://nimistu.ee/litsents
- Machine-readable index for agents: https://nimistu.ee/llms.txt
Links
- Website — https://nimistu.ee
- MCP connection page — https://nimistu.ee/mcp
License
The configuration examples and documentation in this repository are released under the MIT License. The nimistu.ee service and the underlying register data have their own terms — see https://nimistu.ee/litsents.