All servers · Company & business data

Brazil CNPJ company registry

io.github.bnovarini/cnpj-mcp · v0.1.0

Measured by MCP Station

Description written by the publisher, not verified

Brazil's open CNPJ registry: filter and count companies by sector, place, size, MEI, partners.

Connect

claude mcp add --transport http cnpj-mcp https://cnpj-mcp.fly.dev/mcp

{
  "mcpServers": {
    "cnpj-mcp": {
      "url": "https://cnpj-mcp.fly.dev/mcp"
    }
  }
}

Tools as reported by the server

• dataset_info
  What data is loaded: source, snapshot month, row counts, field meanings and caveats. Call first if unsure what the tools cover.
• search_companies
  Find companies/establishments matching filters. Filters (all optional, combined with AND): cnae (CNAE code or prefix, e.g. '4711' or '47', list ok; add include_secondary to also match secondary activities), cnae_secao (letter A-U), uf, municipio (name as in Receita, accents ignored), municipio_codig
• count_companies
  Count companies or establishments, optionally grouped by one or two fields. Filters (all optional, combined with AND): cnae (CNAE code or prefix, e.g. '4711' or '47', list ok; add include_secondary to also match secondary activities), cnae_secao (letter A-U), uf, municipio (name as in Receita, accen
• get_company
  One company by CNPJ (14 digits, with or without punctuation; or the 8-digit root to get the matriz): registration, company data, Simples/MEI, address and contacts, secondary CNAEs, partners (with names), and how many establishments the company has.
• list_partners
  Partners (socios) of one company by CNPJ root or full CNPJ: names, type, role (qualificacao), entry date, age band. CPFs are masked by Receita. faixa_etaria: 1 = 0-12, 2 = 13-20, 3 = 21-30, 4 = 31-40, 5 = 41-50, 6 = 51-60, 7 = 61-70, 8 = 71-80, 9 = over 80, 0 = not applicable.
• search_partners
  Find the companies a person or entity is a partner of, by name. Exact (accent-insensitive, case-insensitive) match on the partner name by default; set contains=true for a substring match (uf required). Optionally narrow with cpf_middle (the 6 digits Receita publishes, e.g. '240659') because the same
• companies_at_address
  Establishments registered at one address, by CEP (8 digits), optionally narrowed by street text, number, municipio or uf. Use it to find companies sharing an address.
• lookup_codes
  Look up Receita's code tables by text or code. kind: cnae (activity), natureza_juridica (legal form), municipio, motivo (reason for status), qualificacao (partner role), pais. Use it to find the CNAE code for a sector, or the municipio name Receita uses, before filtering.

Tool changes

• 2026-10-21: dataset_info, search_companies, count_companies, get_company, list_partners, search_partners, companies_at_address, lookup_codes
• 2026-10-16: dataset_info, search_companies, count_companies, get_company, list_partners, search_partners, companies_at_address, lookup_codes

Repository · JSON · Text for agents · Registry updated 2026-10-08