nimistu MCP — Estonian Business Register for AI assistants
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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:
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_company returns dataAsOf so 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.
Links
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.