validate_company_id

io.github.foretak/registry-mcp · Verify this server

Check whether a national company identifier is well-formed — no network call. `country="NO"` checksum-checks a Norwegian organisasjonsnummer (orgnr, org.nr) for Brønnøysundregistrene / Enhetsregisteret (brreg) — the cheap norway company lookup pre-check for the norwegian business registry. `country="GB"` shape-checks and normalises a UK company number (company registration number, CRN) for Companies House ('445790' → '00445790', 'oc303675' → 'OC303675'); a CRN has no check digit, so a GB `valid: true` means the shape is right and nothing more. `country="SE"` shape-checks and normalises a Swedish organisationsnummer for Bolagsverket ('556016-0680' and 'SE556016068001' both become '5560160680') and accepts a sole trader's twelve-digit personnummer; Sweden's check digit is **not** enforced here (`registry://rules/SE` says why), so an `SE` `valid: true` means the shape is right, `reason` may carry a caveat, and the register's own verdict arrives on the lookup. It is the cheapest way to tell a ten-digit Swedish organisationsnummer from a nine-digit Norwegian organisasjonsnummer. Use it on user input or a spreadsheet column before spending a real `lookup_company` call, since it is instant and free. Returns a ValidationResult and never raises for a malformed identifier: `valid: false` comes with `reason` and `hint` rather than a tool error — this tool answers a question, it does not fail on bad input (D-010). A valid identifier does not mean the entity exists; follow it with `lookup_company` if you need facts. The only error it raises is `unsupported_country`, in the usual `{"error": {"code", "message", "hint"}}` envelope — call `list_countries`.