How to Use the ISS Calculator MCP in VS Code Copilot

Equip your entire team with consistent Brazilian service tax (ISS) tools inside VS Code Copilot.

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Connect ISS Calculator MCP to VS Code Copilot

Create your Vinkius account to connect ISS Calculator to VS Code Copilot — we handle the hosting, security, and runtime updates so you don't have to. No server setup required.

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Setup ISS Calculator with VS Code Copilot

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Standardize Tax Rates Across Your Team

Commit the `.vscode/mcp.json` file and everyone on your team gets the same tools. Ask Copilot to `get_applicable_rate` for a service, and you'll all get the same, accurate number pulled from the source. This ends the 'it works on my machine' problem for financial data. This MCP ensures every developer is building with identical, up-to-date tax information.

A Shared MCP Server for Compliance

When building payment logic, your team can ask Copilot to `check_withholding_status`. The answer comes from the same managed tool, ensuring your application's logic is consistent. Copilot can then generate the correct conditional logic in your code. It's a reliable way to enforce business rules and maintain compliance without manual code reviews for every tax detail.

Generate Auditable Tax Calculations

Have Copilot generate functions that `calculate_tax_liability` based on an invoice amount. Because the tool is versioned and shared, the resulting code is predictable and easy to audit. This isn't just about writing code faster. It's about writing correct, consistent financial code as a team, backed by a toolset that your IT department can manage and trust.

Setup guide

Set up ISS Calculator MCP in VS Code Copilot

Prerequisites

VS Code 1.99 or later with GitHub Copilot extension
Active Vinkius subscription with a valid endpoint token

1

Open MCP configuration

Open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and run "MCP: Add Server". Select HTTP (Streamable) as the server type. VS Code will create .vscode/mcp.json in your workspace.
2

Add the ISS Calculator MCP

Paste the JSON snippet shown on the right into your .vscode/mcp.json. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Switch to Agent mode

Open Copilot Chat (Cmd+Shift+I / Ctrl+Shift+I) and switch to Agent mode using the dropdown. MCP tools are only available in Agent mode — they do not appear in Edit or Ask modes.
4

Verify the connection

In the Copilot Chat input, type # to list available tools. You should see the ISS Calculator tools listed. Try asking: "List my recent ISS Calculator transactions" and Copilot will invoke them automatically.

.vscode/mcp.json

{
  "mcpServers": {
    "iss-calculator-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by ISS Calculator. 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 ISS Calculator MCP in VS Code Copilot

A team lead or admin can add the ISS Calculator configuration to a `.vscode/mcp.json` file and commit it to your repository. Every developer who pulls the code will automatically have the tools available in Copilot Chat.

Yes. During a review, you can open Copilot Chat and ask it to check a rate or calculation using the ISS Calculator. It's a great way to validate financial logic in a pull request.

This MCP provides standard, public tax data. For custom rules, you would build your own internal MCP and use it alongside this one for a complete solution.

This is an MCP available through the Vinkius Marketplace. You subscribe to it on Vinkius, then add the configuration to VS Code. It works with your existing Copilot subscription.

Vinkius is SOC 2 compliant. All requests from VS Code to the MCP, which include data like municipality names and service codes, are protected with end-to-end encryption. We process the request to return a tax calculation and do not persist any of your specific query data.

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