EU Business Check in Pi
VAT numbers, LEIs, registries. The MCP server is https://eubusiness.openkrill.app/mcp. No key. The steps below are only for Pi. A call to check_vat_number was checked against that server on 2026-10-01.
What this server answers
Check a European business before you pay or sign. Ask "is DE 811128135 a valid VAT number?", "what is the LEI of Siemens AG?" or "find the registered company called Equinor in Norway".
EU Business Check asks the official sources directly: the European Commission's VIES service for VAT numbers, the GLEIF Global LEI Index for Legal Entity Identifiers, and two national registers, the French Sirene register (through the api.gouv.fr company search) and the Norwegian Enhetsregisteret.
A VAT check says whether a number is registered for VAT in an EU member state or Northern Ireland on the day of the check. When the registered name and address are published they are shown, but only for legal entities: a name without a legal-form marker such as GmbH, SA, SRL or Limited could be a private person, so it is withheld. Some countries, such as Germany and Spain, do not publish a name at all. If you give your own VAT number, VIES also issues a consultation number that proves the check was made.
LEI and registry results show the legal name, status, legal form, registration number, address and, where published, activity and size. Sole proprietors are left out of every result because they are registered under a private person's name.
It reads only these public registers. It does not rate a company's credit, solvency or reputation, does not cover other countries' registers, and a register can lag behind a change by days. Always check an important detail on the register itself.
It stores nothing about you: answers are cached for up to an hour, except a check that asks for a consultation number, and the only lasting record is a daily count of calls per tool.
What it can do
- Checks whether an EU or Northern Ireland VAT number is valid and shows the name of a legal entity
- Issues a VIES consultation number when given the requester's own VAT number
- Finds the Legal Entity Identifier (LEI) of a company by name, or looks a LEI up
- Searches the French (Sirene) and Norwegian company registers by name or number
- Leaves out sole proprietors and withholds names that could be a private person
Tools
check_vat_number, Check an EU VAT number. Use this when the user asks whether a VAT number is valid or whom it belongs to, for example "is DE 811128135 a valid VAT number?", "check the VAT number on this invoice, ATU33864707" or "I need a VIES consultation number for this supplier". Pass the country code and the VAT number, and requesterCountry with requesterVatNumber only when the user gives their own VAT number for a consultation number. Returns whether the number is registered for VAT on the date of the check and, for a legal entity where the member state publishes it, the registered name and address; a name that could be a private person is withheld. Covers EU member states and Northern Ireland (XI), not GB. Do not use it for a person's tax or identity checks, for VAT rates, or to judge whether a business is trustworthy.find_company_lei, Find a company's LEI. Use this when the user asks for the Legal Entity Identifier (LEI) of a company or wants to look up a LEI, for example "what is the LEI of Siemens AG?", "whose LEI is W38RGI023J3WT1HWRP32?" or "is the LEI of this German company still active?". Pass the company name (and a country code to narrow it) or the 20-character LEI. Returns each entity's LEI, legal name, status, legal form code, country and city, national registration number and the LEI's renewal dates. Sole proprietors are left out. Do not use it to find a private person, for companies that have no LEI (most small businesses), or for financial or credit information.lookup_company_registry, Look up a French or Norwegian company. Use this when the user asks about a company registered in France or Norway, for example "find the French company Danone", "who is behind SIREN 552032534?" or "look up Equinor in the Norwegian business register". Pass country FR or NO and the company name or its registration number (SIREN for France, organisation number for Norway). Returns the legal name, registration number, legal form, status (active, ceased, bankrupt, being wound up), registration date, registered address, activity code and, where published, size or employee count. Sole proprietors are left out. Do not use it for other countries, for owners, directors or any private person, or for accounts and credit ratings.
Add EU Business Check in Pi
Pi does not speak MCP on its own. The pi-mcp-adapter extension (these steps match version 2.34.0) loads remote servers and keeps their schemas out of the prompt until you ask. Install it once, then restart Pi:
pi install npm:pi-mcp-adapterAdd the server to a shared MCP file. Use .mcp.json in the project if only that project needs EU Business Check, or ~/.config/mcp/mcp.json if you want it in every project. Pi also reads ~/.agents/mcp.json. A Pi-only override lives in ~/.pi/agent/mcp.json or .pi/mcp.json and wins over the shared file.
{
"mcpServers": {
"eu-business": {
"url": "https://eubusiness.openkrill.app/mcp"
}
}
}The url is enough. Do not set command: that field is for a local process. No API key header. After restart, run /mcp and confirm the server is listed. The first call connects lazily. Ask: Is the Austrian VAT number ATU33864707 valid, and who is it registered to? The adapter should offer check_vat_number, find_company_lei, lookup_company_registry.
Leave directTools off unless you want those schemas in every turn. With a handful of tools the cost is small. The default proxy is the better fit: search for the tool, then call it. /mcp disable eu-business writes a project override in .pi/mcp.json without editing the shared file. Run /reload after that change.
Pi will not find this server by scanning Cursor or Claude config unless you run /mcp setup and import it. Putting the url in .mcp.json is the direct path and the one this page tests against. The server is the same public endpoint the other clients use, with the same limits and the same privacy rules.
A call checked on 2026-10-01
ATU33864707 is the public example in the plugin's starter prompts. No requester VAT number is sent. The request below was posted to https://eubusiness.openkrill.app/mcp as tools/call. HTTP 200. Source: the EU Business Check server, read 2026-10-01.
{
"method": "tools/call",
"params": {
"name": "check_vat_number",
"arguments": {
"country": "AT",
"vatNumber": "U33864707"
}
}
}- source. European Commission VIES (VAT Information Exchange System)
- country. AT
- name. Red Bull GmbH
- notice. A valid result means the number is registered for VAT in that member state, as the member state's own register reports it on the date shown. It does not say the business is trustworthy, solvent or the one a person is dea
Repeat the call yourself if you need a newer reading. Cached answers expire. A rate limit is not a result: wait and try again. Nothing in the call is a ranking, a filing, or advice.