# simples_nacional — MCP server on mcp.ai
> Looks up a company's status in the Simples Nacional tax regime from the CNPJ, including opt-in and bracket. Platform-hosted, no credentials, pay per query with prepaid credit.

By: mcp.ai · official
Page: https://mcp.ai/simples_nacional

## Connect (MCP protocol)
Remote MCP endpoint (HTTP, streamable): https://api.mcp.ai/p_simples_nacional?ms=1787191740000
Add it as a custom/remote MCP connector, then authenticate when prompted.

## REST API (no MCP client required)
Every tool is also a REST endpoint, authed with a workspace API key.
Discover: GET https://api.mcp.ai/api/simples_nacional/_endpoints   # public; lists every endpoint
Call:     POST https://api.mcp.ai/api/simples_nacional/<endpoint>
  Authorization: Bearer sk_live_…   # create one at https://mcp.ai/settings/api-keys
  Content-Type: application/json
  Body: { …args }   →   { "ok": true, "tool": "<id>", "result": { … } }

## Developer docs
How to use (MCP or REST), markdown: https://mcp.ai/simples_nacional/skill.md
Postman collection (v2.1): https://mcp.ai/simples_nacional/postman.json

## Tools
- simples_nacional_consultar(Cnpj: string, completo?: boolean) — Consulta a situação de uma empresa no Simples Nacional a partir do CNPJ, incluindo opção e enquadramento. Hospedado pela plataforma, sem credenciais, pague por consulta com crédito pré-pago. Consulta 

## Example prompts
- "Is CNPJ 12345678000190 opted into Simples Nacional?"
- "Simples status for CNPJ 12345678000190"

## Links
Docs: https://mcp.ai/docs/mcps/simples_nacional
Website: https://mcp.ai/mcps/simples_nacional