> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cnpj-api.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Simples Nacional

> Simples Nacional tax regime and MEI enrollment status

<ParamField path="cnpj" type="string" required>
  CNPJ number without punctuation (14 digits). Example: `12345678000195`
</ParamField>

<ParamField query="token" type="string">
  Authentication token. Preferred authentication method.
</ParamField>

## Data sources

* [Simples Nacional](https://www8.receita.fazenda.gov.br/SimplesNacional/aplicacoes.aspx?id=21)

Limited to 5 queries per minute for free tokens. See [Rate Limits](/en/limites-de-uso).

<RequestExample>
  ```bash cURL theme={null}
  curl "https://api.cnpj-api.com/v1/simples/12345678000195?token=YOUR_TOKEN"
  ```
</RequestExample>