Brazil CNPJ company registry

Connect Remote server

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

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

{
  "servers": {
    "cnpj-mcp": {
      "type": "http",
      "url": "https://cnpj-mcp.fly.dev/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://cnpj-mcp.fly.dev/mcp

Tools 8 found in our last check

• 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 igno…

• 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…

• 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. '2406…

• 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. CNAE text returns ranked candidates using exact descriptions, curated everyday aliases, word matches an…

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