An astronaut overseeing a futuristic data hub
Download PDFMarkdown Version

Connect Simples Nacional Calculator to ChatGPT and Claude

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Get precise Brazilian tax calculations through your AI agent.

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

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 4 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-04

4 capabilities in this set.

Part of 4 available through Simples Nacional Calculator.

  1. 01

    Calculate effective rate

    This capability calculates the dynamic effective tax rate for a specific revenue bracket.

  2. 02

    Get bracket parameters

    Your agent uses this to pull specific taxation constants based on the business activity and revenue.

  3. 03

    Compute monthly tax amount

    This capability calculates the final monthly tax amount due for the period.

  4. 04

    Evaluate factor r

    This capability checks if a company qualifies for Annex III eligibility via the Fator R rule.

Real work

What teams actually run

01

Monthly Tax Planning

Estimate the upcoming DAS amount based on current revenue and effective rates.

02

Tax Optimization

Check if increasing payroll will trigger Fator R eligibility to lower the tax bracket.

03

Revenue Projections

Model how different revenue levels will change the effective tax rate.

04

Compliance Auditing

Verify that calculated tax amounts match the expected bracket parameters.

Automate a task

Put Simples Nacional Calculator to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Simples Nacional Calculator works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Simples Nacional Calculator to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

730ms average. Fast in production.

Simples Nacional Calculator is checked daily against the live service.

Daily averagePeak 895ms
Oct 3Today
Fastest day
549ms
Slowest day
895ms
14-day trend
Stable+3%

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

Guided setup for Claude? Set up Simples Nacional Calculator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Simples Nacional Calculator owners hand off.

This MCP is built for professionals managing Brazilian small business taxation.

  • 01

    Accountants

    Hand off complex Simples Nacional math to an AI agent to speed up client reporting.

  • 02

    Tax Consultants

    Use the capability to quickly run Fator R scenarios for different client profiles.

  • 03

    Small Business Owners

    Get instant estimates of monthly tax liabilities (DAS) through an AI interface.

FAQ

Questions Simples Nacional Calculator owners ask.

  • 01

    What is the Simples Nacional Calculator MCP used for?

    It is used to calculate effective tax rates, Fator R eligibility, and monthly DAS amounts for the Brazilian Simples Nacional regime.

  • 02

    Does this MCP handle different tax annexes?

    Yes, it handles progressive revenue tiers across Annexes I through V.

  • 03

    How does it determine Fator R eligibility?

    It evaluates Fator R by comparing a company's payroll expenses to its gross revenue.

  • 04

    Can I use this with Claude or Cursor?

    Yes, you can connect this MCP to any MCP-compatible client like Claude, Cursor, or Windsurf.

  • 05

    Do I need to host the MCP myself?

    No, Vinkius hosts and manages the MCP for you, so it is ready to use once connected.

  • 06

    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.

  • 07

    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.

  • 08

    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.

Explore

More in Finance

Suggestions

Connect Simples Nacional Calculator to Claude, Cursor, ChatGPT & more