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Use Simples Nacional Calculator with your AI.

Connect your account once and let the AI you already use work with it, without building another integration. Calculate effective tax rates, Fator R eligibility, and monthly DAS amounts for the Brazilian Simples Nacional regime.

Included with plan

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

Waiting for input…

Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Complete set · 4 capabilities

The complete Simples Nacional Calculator capability set.

These are the exact actions your AI can choose when you ask it to work with Simples Nacional Calculator.

Capability set01 / 01

01-04

4 capabilities in this set.

Part of 4 available through Simples Nacional Calculator.

  1. 01

    Calculate effective rate

    Calculate the dynamic effective tax rate

  2. 02

    Get bracket parameters

    Retrieve taxation constants based on activity and revenue

  3. 03

    Compute monthly tax amount

    Calculate the final tax amount due

  4. 04

    Evaluate factor r

    Check eligibility for Annex III via Fator R

Observed, not estimated

626ms average. Fast in production.

Simples Nacional Calculator is checked daily against the live service.

Daily averagePeak 854ms
Aug 20Today
Fastest day
489ms
Slowest day
854ms
14-day trend
Slowing+12%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 4 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Simples Nacional Calculator, so you can see the experience inside your AI.

It does not authenticate your account with Simples Nacional Calculator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Simples Nacional Calculator Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_wh7Vc0yyMzCvjI1VHFexb9BswR51aQnhfszsWVkb/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Simples Nacional Calculator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "simples-nacional-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_wh7Vc0yyMzCvjI1VHFexb9BswR51aQnhfszsWVkb/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

FAQ

Questions Simples Nacional Calculator owners ask.

  • 01

    How can I find the tax rate for my business activity?

    You can use the get_bracket_parameters capability. Provide your accumulated revenue from the last 12 months and the specific Annex type (e.g., Annex I for commerce) to retrieve the nominal rate and deduction amount.

  • 02

    What is Fator R and how does it affect my taxes?

    Fator R is a rule for certain service activities. By using evaluate_factor_r, you can check if your payroll costs relative to revenue allow you to move from Annex V to the more favorable Annex III.

  • 03

    Can I calculate the exact amount of DAS to pay?

    Yes. After determining your effective rate, use compute_monthly_tax_amount with your current month's revenue to get the final currency value of your tax liability.

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