CNPJ.ws

# CNPJ.ws > CNPJ.ws is an API (Application Programming Interface) for querying data of Brazilian legal entities through the CNPJ (Cadastro Nacional da Pessoa Jurídica). It returns public company data in JSON format, making it easy to integrate with any software. Keep your suppliers' and customers' data always up to date by consulting the complete data of any company using its CNPJ. The API is developed and maintained by Bitize, a startup born in the Sorocaba Technology Park, which uses this data in BitERP, its AI-powered ERP, to find and approve suppliers for its clients. Key facts: - **Data source**: CNPJ.ws periodically fetches data from public agencies such as the Receita Federal (Federal Revenue), SEFAZ, Sintegra, and Suframa, enriching its database and delivering relevant, updated information in an organized and fast manner. - **Detailed information**: Partners (sócios), branches (estabelecimentos), addresses, Simples Nacional, MEI, state registrations (inscrições estaduais), Suframa registrations, economic activities (CNAE), legal nature, company size, tax regimes (available from 2021 onward), registration status, and more. - **Two API tiers**: a free Public API (`https://publica.cnpj.ws/`) and a token-authenticated Commercial API (`https://comercial.cnpj.ws/`, authenticated with the `x_api_token` header). - **Operations**: query a CNPJ, query all establishments by the CNPJ root (first 8 digits), search companies by filters, validate a Suframa registration, and …