How to Use the Tax Regime Comparator MCP in Windsurf

Get instant Brazilian tax simulations and pick the right regime directly inside Windsurf using Cascade.

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Connect Tax Regime Comparator MCP to Windsurf

Create your Vinkius account to connect Tax Regime Comparator to Windsurf — we handle the hosting, security, and runtime updates so you don't have to. No server setup required.

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Setup Tax Regime Comparator with Windsurf

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Run instant tax simulations in Windsurf

Let's cut to the chase. Brazilian tax laws are a mess, and choosing the wrong corporate structure will destroy your margins. This MCP lets Cascade analyze your numbers and run the math to see if you should be on Simples Nacional, Lucro Presumido, or Lucro Real. The tool `compare_tax_regimes` handles the heavy lifting by simulating these options side-by-side. Cascade automatically pulls your revenue data, inputs the variables, and shows you the exact tax burden for each path.

Get granular breakdowns of your tax bills

Right. Let's look at the numbers because the math doesn't lie. Knowing which regime is cheaper is only half the battle; you also need to know exactly where your cash is going. Cascade uses `get_regime_breakdown` to extract the exact figures for IRPJ, CSLL, PIS, COFINS, and municipal ISS. You get a clear, itemized report of your obligations without manual spreadsheets.

Autonomous tax planning with Cascade

Here's the catch. Most teams waste weeks arguing over tax planning because they have to manually calculate different scenarios. With this MCP, Cascade operates on your behalf to run simulations across different revenue targets. It chains the calculations in the background and presents the final recommendation directly in your workspace.

Setup guide

Set up Tax Regime Comparator MCP in Windsurf

Prerequisites

Windsurf IDE installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP configuration

Click the Cascade assistant icon in the sidebar, then click the hammer icon (🔨) at the top of the panel. Select "Configure" to open ~/.codeium/windsurf/mcp_config.json.
2

Add the Tax Regime Comparator MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Refresh MCPs

Go back to the hammer icon (🔨) in Cascade and click "Refresh". Windsurf will detect the new server. No full restart is needed — the connection is hot-reloaded.
4

Verify in Cascade

Start a new Cascade conversation and ask something like "Show my Tax Regime Comparator payment history." If connected, Cascade will call the Tax Regime Comparator tools directly. You will see a green dot next to the server name in the MCP panel.

mcp_config.json

{
  "mcpServers": {
    "tax-regime-comparator-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Tax Regime Comparator. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Tax Regime Comparator MCP in Windsurf

It allows Windsurf to calculate your Brazilian tax liabilities automatically. Cascade feeds your revenue and expense data into the simulation tool to find the most profitable corporate structure.

Yes. The MCP handles the complex non-cumulative PIS and COFINS rules for Lucro Real. It compares them directly against the fixed margins of Lucro Presumido so you don't overpay.

Cascade reads your local financial files, plans the calculation steps, and runs the comparisons. You don't have to prompt it for each step; it handles the entire simulation autonomously.

No. The calculations use standard fiscal brackets. The system processes your corporate revenue and expenses against these rules to keep your estimates accurate.

Your corporate revenue, operational expenses, and municipal ISS rates are processed locally on your machine. No financial history is sent to external platforms or used for model training.

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