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CNPJ.ws
Community listing
llms.txt reachable
AI Impact Score 98/100 · A
CNPJ.ws provides structured information for AI assistants via an llms.txt file. Industry: Developer Tools. The website cnpj.ws provides its llms.txt at https://cnpj.ws/llms.txt. Listed since 24 August 2026.
Check of the llms.txt
Automated check on Sep 29, 2026: the llms.txt of cnpj.ws is reachable (HTTP 200, text/plain, 8.2 KB). It starts with a title and a short summary, is divided into 7 sections and contains 40 links. It refers to a more detailed llms-full.txt. The file is written mainly in English.
llms.txt address
https://cnpj.ws/llms.txt
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llms.txt: current content
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# 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 …
Excerpt from the first section of the llms.txt of cnpj.ws, retrieved Sep 29, 2026. Source: https://cnpj.ws/llms.txt.