How do I use this MCP with Claude?

You connect once through the Vinkius catalog. After that, you can simply ask Claude to perform tax calculations using the capabilities provided by this MCP.

Does this capability handle input credits?

Yes, the calculate_non_cumulative_tax capability is specifically designed to account for input credits to find your net liability.

Can I compare different tax regimes?

Yes, you can use the evaluate_regime_comparison capability to see which taxation method is more efficient for your specific revenue and costs.

Do I need to host this myself?

No, Vinkius hosts and manages the MCP for you. You just connect your client and start using the capabilities.

What is the difference between the two regimes in this capability?

The cumulative regime uses fixed rates, while the non-cumulative regime allows for the calculation of net liability by including input credits.

How do I calculate taxes for the cumulative regime?

Use the calculate_cumulative_tax capability by providing your total gross revenue. The capability applies a 0.65% rate for PIS and 3% for COFINS.

Can I include input credits in the calculation?

Yes, when using calculate_non_cumulative_tax, you can provide a JSON array of input costs (like raw materials or energy) to calculate available tax credits.

How does the regime comparison capability work?

The evaluate_regime_comparison capability calculates both taxation methods simultaneously and recommends the one that results in a lower total tax burden.

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Connect Piscofins Tax 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 accurate Brazilian social contribution math in seconds.

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.

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.

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 · 3 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through PIS/COFINS Calculator.

01
Calculate non cumulative tax
This capability calculates your net PIS and COFINS liability under the non-cumulative regime. It factors in input credits to find the final amount owed.
02
Calculate cumulative tax
This capability handles PIS and COFINS liability for the cumulative regime. It uses fixed rates to provide a simplified tax total.
03
Evaluate regime comparison
This capability compares the cumulative and non-cumulative taxation regimes. It helps you decide which method is more cost-effective based on your revenue and costs.

Real work

What teams actually run

Tax Optimization

Compare cumulative vs non-cumulative regimes to see which one lowers your total tax bill.

Monthly Compliance

Calculate your monthly PIS and COFINS obligations based on recent revenue.

Cost Modeling

Estimate how changes in raw material costs will affect your net tax liability through input credits.

Audit Preparation

Verify that your manual tax calculations match the results from the MCP capabilities.

Automate a task

Put PIS/COFINS 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

PIS/COFINS 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.

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

You don't need a client to put PIS/COFINS 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

743ms average. Fast in production.

PIS/COFINS Calculator is checked daily against the live service.

Daily averagePeak 898ms

Oct 3Today

Fastest day: 549ms
Slowest day: 898ms
14-day trend: Improving-7%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 3 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 PIS/COFINS Calculator, so you can see the experience inside your AI.

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

PIS/COFINS Calculator Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_j7waXcHqDX697jZrRvsxMOtOw6u6ylkFdPzmImAG/mcp

Claude Desktop

Follow the steps below to connect in seconds.

1In Claude Desktop, open Settings → Connectors.
2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
3Click Add and start a new chat — PIS/COFINS Calculator capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "piscofins-tax-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_j7waXcHqDX697jZrRvsxMOtOw6u6ylkFdPzmImAG/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 PIS/COFINS Calculator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work PIS/COFINS Calculator owners hand off.

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

01
Accountants
Hand off complex regime comparisons and credit calculations to the agent.
02
Tax Analysts
Use the capability to quickly verify liability amounts for different business scenarios.
03
Financial Controllers
Run cost-benefit analyses between tax regimes to optimize cash flow.

FAQ

Questions PIS/COFINS Calculator owners ask.

01
How do I use this MCP with Claude?
You connect once through the Vinkius catalog. After that, you can simply ask Claude to perform tax calculations using the capabilities provided by this MCP.
02
Does this capability handle input credits?
Yes, the calculate_non_cumulative_tax capability is specifically designed to account for input credits to find your net liability.
03
Can I compare different tax regimes?
Yes, you can use the evaluate_regime_comparison capability to see which taxation method is more efficient for your specific revenue and costs.
04
Do I need to host this myself?
No, Vinkius hosts and manages the MCP for you. You just connect your client and start using the capabilities.
05
What is the difference between the two regimes in this capability?
The cumulative regime uses fixed rates, while the non-cumulative regime allows for the calculation of net liability by including input credits.
06
How do I calculate taxes for the cumulative regime?
Use the calculate_cumulative_tax capability by providing your total gross revenue. The capability applies a 0.65% rate for PIS and 3% for COFINS.
07
Can I include input credits in the calculation?
Yes, when using calculate_non_cumulative_tax, you can provide a JSON array of input costs (like raw materials or energy) to calculate available tax credits.
08
How does the regime comparison capability work?
The evaluate_regime_comparison capability calculates both taxation methods simultaneously and recommends the one that results in a lower total tax burden.

Explore

More in Finance

Connect PIS/COFINS Calculator to Claude, Cursor, ChatGPT & more

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

Each Connector runs inside its own sealed environment.

One switch stops every agent. Instantly.

Spending limits that pause instead of surprise.

We ship only the actions that matter.

01-03

Calculate non cumulative tax

Calculate cumulative tax

Evaluate regime comparison

What teams actually run

Tax Optimization

Monthly Compliance

Cost Modeling

Audit Preparation

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

PIS/COFINS Calculator Connector

Claude Desktop

Accountants

Tax Analysts

Financial Controllers

How do I use this MCP with Claude?

Does this capability handle input credits?

Can I compare different tax regimes?

Do I need to host this myself?

What is the difference between the two regimes in this capability?

How do I calculate taxes for the cumulative regime?

Can I include input credits in the calculation?

How does the regime comparison capability work?

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