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cnpjaberto

SDK em Python e servidor Model Context Protocol (MCP) para o cnpjaberto.com.br, o cadastro aberto de empresas brasileiras (CNPJ). Permite consulta de empresa, grafo de sócios, joins por endereço e contato, estatísticas por CNAE, e panoramas nacional e anual.

pip install cnpjaberto          # apenas SDK
pip install cnpjaberto[mcp]     # SDK + servidor MCP para Claude Desktop e similares

Início rápido com o SDK

from cnpjaberto import Client

with Client() as cnpj:                       # lê CNPJABERTO_API_KEY do ambiente
    empresa = cnpj.lookup("18.236.120/0001-58")
    print(empresa["razao_social"])

    achados = cnpj.search("nubank", per_page=5)
    for h in achados["results"]:
        print(h["cnpj"], h["razao_social"])

    snap = cnpj.panorama_year(2024)
    print(f"{snap['abertas']:,} abertas, {snap['fechadas']:,} fechadas em 2024")

A chave de API é obrigatória. Crie uma conta gratuita em cnpjaberto.com.br/planos, copie sua chave e exporte:

export CNPJABERTO_API_KEY=sua_chave_aqui

Servidor MCP (Claude Desktop, Cursor, Cline)

Instale o extra e adicione esta config no seu cliente.

pip install cnpjaberto[mcp]

~/Library/Application Support/Claude/claude_desktop_config.json (macOS) ou %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "cnpjaberto": {
      "command": "cnpjaberto-mcp",
      "env": { "CNPJABERTO_API_KEY": "sua_chave_aqui" }
    }
  }
}

Reinicie o Claude Desktop. Agora dá para perguntar coisas como:

  • "Consulta o CNPJ 18.236.120/0001-58 e me diz quando foi fundado."
  • "Quantas empresas brasileiras abriram em 2024 vs 2023? Quais estados mais cresceram?"
  • "Acha empresas onde 'Maria Silva' aparece como sócia, agrupando por estado."
  • "Que outras empresas estão registradas no mesmo endereço da matriz da Magazine Luiza?"

Tools expostas

Tool O que retorna
lookup_cnpj(cnpj) Registro completo: razão social, capital, sócios, com estabelecimentos[] (matriz e filiais, endereço, telefones, CNAEs)
list_filiais(cnpj) Filiais de uma matriz, paginado, filtro opcional por UF
search_companies(query) Busca por razão social, fantasia ou dígitos do CNPJ (mínimo 3 chars)
companies_by_owner(name) Empresas onde a pessoa aparece como sócia; cpf ajuda a desambiguar homônimos
companies_at_same_address(cep, logradouro, numero) Outras empresas registradas no mesmo endereço
companies_by_contact(email | ddd+telefone) Empresas que compartilham o mesmo email ou telefone
cnae_stats(codigo) Estatísticas agregadas de um CNAE (contagem, top UFs, top municípios)
panorama_overview() Estatísticas nacionais: top UFs e CNAEs, faixas de capital, idade, histórico de 10 anos
panorama_year(year) Recorte anual: aberturas e fechamentos, série mensal, fatia MEI

Erros tipados

from cnpjaberto import Client, NotFoundError, RateLimitError, AuthError

with Client() as cnpj:
    try:
        cnpj.lookup("00000000000000")
    except NotFoundError:
        ...
    except RateLimitError as e:
        print("Cota diária:", e.payload)
    except AuthError:
        ...

Fonte de dados

Todos os dados vêm do dump público de CNPJ da Receita Federal, atualizado mensalmente. O cnpjaberto.com.br ingere, indexa e serve com lookups sub-segundo, mais joins de valor agregado (grafo de sócios, endereços compartilhados, agregados por CNAE) sobre cerca de 70 milhões de estabelecimentos e 67 milhões de empresas.

Licença

MIT.

Metadata

Release files for cnpjaberto 0.1.1

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Source distribution for cnpjaberto 0.1.1
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