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Connect ICMS Calculator to ChatGPT, Claude and Gemini

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. Automate complex tax calculations within your AI agent.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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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 ICMS Calculator.

  1. 01

    Calculate tax differential

    This capability calculates the DIFAL amount for B2C interstate operations. It handles the math for tax differentials during cross-state sales.

  2. 02

    Get interstate rate

    This capability retrieves the correct interstate tax rate. It looks up rates based on the origin and destination regions in Brazil.

  3. 03

    Calculate tax base

    This capability calculates the grossed-up product value. It uses the "inside" calculation method to find the tax-inclusive base.

  4. 04

    Calculate icms substitution

    This capability calculates the ICMS-ST amount to be collected. It manages the Tax Substitution math for your transactions.

Real work

What teams actually run

01

B2C Interstate Sales

Calculate the DIFAL amount for a customer buying a product from a different state.

02

Tax Substitution Compliance

Determine the exact ICMS-ST amount to collect for specific product movements.

03

Product Pricing

Find the grossed-up product value using the inside calculation method.

04

Regional Logistics

Identify applicable interstate rates when planning shipments between Brazilian regions.

Automate a task

Put ICMS 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

ICMS 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 ICMS 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

747ms average. Fast in production.

ICMS Calculator is checked daily against the live service.

Daily averagePeak 902ms
Oct 3Today
Fastest day
553ms
Slowest day
902ms
14-day trend
Stable0%

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 ICMS Calculator, so you can see the experience inside your AI.

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

ICMS Calculator Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_nKPLhJb00sxxzp6Bnq3okHk7UsNFivgJGnUkodcp/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 — ICMS Calculator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "icms-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_nKPLhJb00sxxzp6Bnq3okHk7UsNFivgJGnUkodcp/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 ICMS Calculator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work ICMS Calculator owners hand off.

This MCP is built for professionals managing Brazilian tax compliance and logistics.

  • 01

    Tax Accountants

    Hand off complex ICMS-ST and DIFAL math to your agent.

  • 02

    E-commerce Managers

    Let your AI calculate interstate tax differentials for B2C orders.

  • 03

    Logistics Coordinators

    Use the agent to quickly check interstate rates for regional shipments.

FAQ

Questions ICMS Calculator owners ask.

  • 01

    How do I use this for DIFAL?

    You tell your AI client the product value, the interstate rate, and the destination internal rate. The agent then uses the calculate_tax_differential capability to get the amount.

  • 02

    Can this MCP handle ICMS-ST?

    Yes, it includes a specific capability to calculate the amount of ICMS-ST to be collected.

  • 03

    Does it support different Brazilian regions?

    Yes, the get_interstate_rate capability identifies the correct rates based on the origin and destination regions.

  • 04

    What is the 'inside' calculation method?

    It is a method used to find the grossed-up product value, which the calculate_tax_base capability performs.

  • 05

    Do I need to host this myself?

    No, Vinkius hosts and manages the MCP so you can connect it to your client with one click.

  • 06

    How do I calculate the grossed-up product value?

    Use the calculate_tax_base capability. You provide the net product value and the tax rate, and it returns the grossed-up base and the tax amount included in that base.

  • 07

    Can I calculate ICMS-ST with MVA?

    Yes. The calculate_icms_substitution capability allows you to input the initial tax base, the MVA percentage, and the relevant interstate and internal rates to find the substitution amount.

  • 08

    How does the capability determine the interstate rate?

    The get_interstate_rate capability checks the origin and destination regions. It applies 4% for imports, 7% for movements from South/Southeast to North/Northeast/Midwest, and 12% for all other interstate routes.

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