Nimistu MCP

An MCP server that connects AI assistants to the Estonian Business Register, allowing users to query company profiles, ownership structures, person connections, trademarks, and sector data using natural language. It provides traceable, source-stamped answers from open data without requiring an API key.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Community listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by Nimistu

MCP endpoint (Streamable HTTP)

https://nimistu.ee/api/mcp

Vendor documentation

What its tools do

10 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

10 of 10 have a description · 10 of 10 declare behavior hints · 10 of 10 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 6, 2026, 3:24 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Query company profiles including owners, board, and financials
Find companies connected to a specific person
Search for trademarks by text and identify owners
Look up companies by EMTAK activity code

Source and maintenance

Community listingRegistry 1.0.0

mcp-registry: io.github.Nimistu/nimistu-mcp@1.0.0 Source repository Project website

Maintenance checked: Nov 6, 2026, 3:14 PM UTC

Protocol and capabilities

Server: nimistu 0.1.0
MCP protocol negotiated in check: 2025-11-25
Tools: 10 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

nimistu (https://nimistu.ee) is a free, ad-free public register of Estonian companies, non-profits, foundations, people and related open data, aggregated from official sources (Äriregister, MTA, EUIPO, procurement registers, sanctions lists, and more), each field carrying its source and last-update date. Use this server to answer questions about Estonian companies and people: company details (status, address, activity/EMTAK code, financials, tax debt, board, owners, subsidiaries, foreign parent, trademarks), a person and their company connections, EMTAK activity classifications, trademarks, "what happened today" in the register, and curated rankings (top taxpayers, employers, procurement winners, MPs in business, etc.). Workflow: call `search` to find an entity, then `fetch` (by the returned id) or the richer `get_company` / `get_person` tools for full detail. Every tool accepts an optional `locale` argument — "et" (Estonian, default) or "en" (English) — controlling labels and returned URLs.

Tools

10 advertised

search — Search Estonian companies, people and trademarks

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Full-text search across the nimistu register of Estonian companies, people and trademarks. Returns matches each with a stable `id` (pass to `fetch`, `get_company` or `get_person`) and a canonical nimistu.ee URL. Use this first to locate an entity by name or registry code.

search input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "query"
  ],
  "properties": {
    "query": {
      "type": "string",
      "description": "A company name, person name, 8-digit registry code, or trademark text."
    },
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    }
  },
  "additionalProperties": false
}

search output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "results"
  ],
  "properties": {
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "title",
          "url"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "url": {
            "type": "string"
          },
          "title": {
            "type": "string"
          }
        },
        "additionalProperties": false
      },
      "description": "Matched companies, people and trademarks; pass `id` to fetch/get_company/get_person."
    }
  },
  "additionalProperties": false
}

search annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

fetch — Fetch a nimistu record by id

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Retrieve the full content of a record by the `id` returned from `search` (e.g. 'company:10000018', 'person:18345', 'trademark:123', 'emtak:47811'). Returns the record text, its canonical nimistu.ee URL and metadata.

fetch input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "Record id from search, formatted '<type>:<value>'."
    },
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    }
  },
  "additionalProperties": false
}

fetch output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "id",
    "title",
    "text",
    "url",
    "metadata"
  ],
  "properties": {
    "id": {
      "type": "string"
    },
    "url": {
      "type": "string",
      "description": "Canonical nimistu.ee URL for the record."
    },
    "text": {
      "type": "string",
      "description": "The full record rendered as Markdown."
    },
    "title": {
      "type": "string"
    },
    "metadata": {
      "type": "object",
      "description": "Type-specific metadata, e.g. { type, regCode }.",
      "additionalProperties": {}
    }
  },
  "additionalProperties": false
}

fetch annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

get_company — Get full company profile

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Full profile of an Estonian company by its registry code: status, address, activity (EMTAK), VAT, employees, financials, tax debt, sanctions, board members, shareholders, supervisory board, foreign parent, subsidiaries and trademarks.

get_company input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "reg_code"
  ],
  "properties": {
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    },
    "reg_code": {
      "type": "string",
      "description": "8-digit Estonian registry code (e.g. '10000018')."
    }
  },
  "additionalProperties": false
}

get_company output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "regCode",
    "name",
    "board",
    "shareholders",
    "council",
    "founders",
    "subsidiaryCount",
    "trademarkCount",
    "url"
  ],
  "properties": {
    "lei": {},
    "url": {
      "type": "string"
    },
    "name": {
      "type": "string"
    },
    "board": {
      "type": "array",
      "items": {},
      "description": "Current board members."
    },
    "email": {},
    "phone": {},
    "county": {},
    "status": {},
    "address": {},
    "council": {
      "type": "array",
      "items": {},
      "description": "Supervisory board."
    },
    "regCode": {
      "type": "string"
    },
    "website": {},
    "activity": {},
    "founders": {
      "type": "array",
      "items": {}
    },
    "emtakCode": {},
    "legalForm": {},
    "vatNumber": {},
    "taxDebtEur": {},
    "registeredAt": {},
    "shareholders": {
      "type": "array",
      "items": {}
    },
    "employeeCount": {},
    "foreignParent": {
      "description": "{ name, country, regCode } or null."
    },
    "lastProfitEur": {},
    "sanctionCount": {},
    "deregisteredAt": {},
    "lastReportYear": {},
    "lastRevenueEur": {},
    "trademarkCount": {
      "type": "number"
    },
    "shareCapitalEur": {},
    "subsidiaryCount": {
      "type": "number"
    }
  },
  "additionalProperties": false
}

get_company annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

get_person — Get a person and their company connections

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Profile of a person in the Estonian business register: birth year, sanctions, and all companies they are connected to (board member, shareholder, etc.), current and past. Look the person up with `search` first to get their id.

get_person input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "id": {
      "type": "integer",
      "description": "Internal person id (from a search result, e.g. 18345)."
    },
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    },
    "isikukood": {
      "type": "string",
      "description": "Estonian personal identification code (11 digits), if known."
    }
  },
  "additionalProperties": false
}

get_person output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "name",
    "connectionCount",
    "connections",
    "url"
  ],
  "properties": {
    "id": {},
    "url": {
      "type": "string"
    },
    "name": {
      "type": "string"
    },
    "country": {},
    "birthYear": {},
    "connections": {
      "type": "array",
      "items": {},
      "description": "Companies the person is/was connected to, each with its roles."
    },
    "sanctionCount": {},
    "connectionCount": {
      "type": "number"
    }
  },
  "additionalProperties": false
}

get_person annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

lookup_emtak — Look up or search EMTAK activity codes

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

EMTAK is the Estonian classification of economic activities. Pass `code` for details + stats on one activity, or `query` to search activities by Estonian name. Returns the code, ET/EN name and the count of active companies.

lookup_emtak input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "code": {
      "type": "string",
      "description": "Exact EMTAK code, e.g. '47811'."
    },
    "query": {
      "type": "string",
      "description": "Search activities by Estonian keyword, e.g. 'jaemüük'."
    },
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    }
  },
  "additionalProperties": false
}

lookup_emtak output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "url": {
      "type": "string"
    },
    "code": {
      "type": "string"
    },
    "query": {
      "type": "string"
    },
    "stats": {},
    "nameEn": {},
    "nameEt": {},
    "results": {
      "type": "array",
      "items": {}
    },
    "counties": {
      "type": "array",
      "items": {}
    },
    "activeCompanies": {}
  },
  "additionalProperties": false
}

lookup_emtak annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

companies_by_emtak — List companies by EMTAK activity

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

List active Estonian companies whose primary activity is a given EMTAK code, optionally filtered by county. Use `lookup_emtak` to find the code first.

companies_by_emtak input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "code"
  ],
  "properties": {
    "code": {
      "type": "string",
      "description": "Exact EMTAK code, e.g. '47811'."
    },
    "limit": {
      "type": "integer",
      "maximum": 100,
      "minimum": 1,
      "description": "Max companies to return (default 25)."
    },
    "county": {
      "type": "string",
      "description": "Optional county filter, e.g. 'Harju maakond'."
    },
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    }
  },
  "additionalProperties": false
}

companies_by_emtak output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "code",
    "rows",
    "url"
  ],
  "properties": {
    "url": {
      "type": "string"
    },
    "code": {
      "type": "string"
    },
    "rows": {
      "type": "array",
      "items": {},
      "description": "Companies with name, reg_code and city."
    },
    "total": {
      "description": "Total active companies matching (number)."
    }
  },
  "additionalProperties": false
}

companies_by_emtak annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

whats_new_today — What happened today in the Estonian business register

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

A summary of recent activity: a daily narrative of notable changes plus counts of newly registered companies (last few working days), broken down by legal form, county and activity, with a sample of the newest companies.

whats_new_today input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    }
  },
  "additionalProperties": false
}

whats_new_today output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "forms",
    "counties",
    "emtak",
    "newest"
  ],
  "properties": {
    "emtak": {
      "type": "array",
      "items": {},
      "description": "New registrations by activity."
    },
    "forms": {
      "type": "array",
      "items": {},
      "description": "New registrations by legal form."
    },
    "newest": {
      "type": "array",
      "items": {},
      "description": "Sample of the newest companies."
    },
    "totals": {
      "description": "{ total, today } new-registration counts."
    },
    "summary": {
      "description": "Daily narrative summary text, or null."
    },
    "counties": {
      "type": "array",
      "items": {},
      "description": "New registrations by county."
    },
    "summaryDate": {}
  },
  "additionalProperties": false
}

whats_new_today annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

search_trademarks — Search trademarks

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Search Estonian-linked trademarks (EUIPO + Estonian Patent Office) by their verbal element. Returns each mark with its status and the owning company.

search_trademarks input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 50,
      "minimum": 1,
      "description": "Max results (default 10)."
    },
    "query": {
      "type": "string",
      "description": "Trademark text to search for, e.g. 'BOLT'."
    },
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    }
  },
  "additionalProperties": false
}

search_trademarks output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "query",
    "results"
  ],
  "properties": {
    "query": {
      "type": "string"
    },
    "results": {
      "type": "array",
      "items": {},
      "description": "Matched trademarks, each with status and owning company."
    }
  },
  "additionalProperties": false
}

search_trademarks annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

annual_reports — Annual reports (majandusaasta aruanded) for an Estonian company

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Every filed annual report for one company, newest first: revenue, profit, employees, equity, assets, liabilities and labour cost, plus ratios computed from them (net margin, revenue and profit per employee, year-over-year revenue change, equity ratio, current ratio, labour share) and where the latest year sits against the company's EMTAK sector median. Use `get_company` for the profile; use this when the question is about financial history or performance.

annual_reports input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "reg_code"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 30,
      "minimum": 1,
      "description": "How many years to return, newest first. Default 10."
    },
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    },
    "reg_code": {
      "type": "string",
      "description": "8-digit Estonian registry code (e.g. '10000018')."
    }
  },
  "additionalProperties": false
}

annual_reports output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "regCode",
    "name",
    "reports",
    "url"
  ],
  "properties": {
    "url": {
      "type": "string"
    },
    "name": {
      "type": "string"
    },
    "ratios": {
      "description": "Computed from the latest report: { netMarginPct, revenuePerEmployee, profitPerEmployee, revenueGrowthPct, equityRatioPct, currentRatio, labourSharePct }. Null when nothing has been filed."
    },
    "sector": {
      "description": "Peer comparison for the latest year: { key, level, companies, medianRevenueEur, medianMarginPct, medianRevPerEmployee, medianGrowthPct }, or null when the sector has too few filers."
    },
    "regCode": {
      "type": "string"
    },
    "reports": {
      "type": "array",
      "items": {},
      "description": "One entry per filed year: { year, revenueEur, profitEur, employees, equityEur, totalAssetsEur, liabilitiesEur, labourCostsEur, isAudited }."
    }
  },
  "additionalProperties": false
}

annual_reports annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

rankings — Top lists / rankings of Estonian companies and people

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Curated leaderboards from the nimistu data: top taxpayers, revenue, profit, employers, tax debtors, grant recipients, procurement winners, people holding the most board seats, audit firms, recipients of state payments, VAT groups, top corporate shareholders, and members of Parliament (Riigikogu) or the Cabinet active in business.

rankings input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "list"
  ],
  "properties": {
    "list": {
      "enum": [
        "top_taxpayers",
        "top_revenue",
        "top_profit",
        "top_employers",
        "top_tax_debtors",
        "top_grant_recipients",
        "top_procurement_winners",
        "top_board_seat_holders",
        "top_audit_firms",
        "top_state_payments",
        "top_vat_groups",
        "top_shareholder_companies",
        "riigikogu_in_business",
        "cabinet_in_business"
      ],
      "type": "string",
      "description": "Which leaderboard to return."
    },
    "year": {
      "type": "integer",
      "description": "Year for financial lists (taxpayers/revenue/profit/employers). Defaults to the latest available."
    },
    "limit": {
      "type": "integer",
      "maximum": 50,
      "minimum": 1,
      "description": "How many rows (default 20)."
    },
    "locale": {
      "enum": [
        "et",
        "en"
      ],
      "type": "string",
      "description": "Response language for labels and URLs. 'et' (Estonian, default) or 'en'."
    }
  },
  "additionalProperties": false
}

rankings output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "list",
    "rows"
  ],
  "properties": {
    "list": {
      "type": "string"
    },
    "rows": {
      "type": "array",
      "items": {},
      "description": "Ranked entries for the requested leaderboard."
    },
    "year": {
      "description": "Year used for financial lists, or null."
    }
  },
  "additionalProperties": false
}

rankings annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (2 of 2 answered).

2026-11-06: 1 of 1 checks answered
2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 1424 ms
95th percentile latency: 1424 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 6, 2026, 3:24 PM UTC · probe · passed · 1424 ms · metadata changed · 10 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http nimistu-mcp https://nimistu.ee/api/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add nimistu-mcp --url https://nimistu.ee/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable nimistu-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "nimistu-mcp": {
      "url": "https://nimistu.ee/api/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "nimistu-mcp": {
      "type": "streamableHttp",
      "url": "https://nimistu.ee/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start nimistu-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "nimistu-mcp": {
      "type": "http",
      "url": "https://nimistu.ee/api/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http nimistu-mcp https://nimistu.ee/api/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://nimistu.ee/api/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "nimistu-mcp": {
      "serverUrl": "https://nimistu.ee/api/mcp"
    }
  }
}

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