How do I use this MCP in Claude or Cursor?

You connect to the Vinkius catalog once, and the capabilities become available as functions for your AI client to call.

Can I calculate tax with deductions?

Yes, the calculate_tax_liability capability allows you to include deduction amounts to find the final taxable base.

Does it cover different municipalities?

Yes, the capabilities are designed to look up rates and withholding rules for specific municipalities.

What information do I need to provide for a tax calculation?

You typically need the municipality name, the type of service, the gross amount, and any applicable deductions.

Is this for calculating income tax?

No, this MCP is specifically for calculating Service Tax (ISS) based on municipal rates.

How can I find the tax rate for a specific city?

You can use the get_applicable_rate capability by providing the municipality name and the service type.

Does the calculator handle tax withholding?

Yes. Use check_withholding_status to see if the service taker is responsible for paying the tax at source.

Can I include deductions in my calculation?

Yes, using calculate_tax_liability, you can provide a deduction amount. The capability will only apply it if the service type allows for deductions in that municipality.

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Connect ISS 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. Get accurate municipal tax calculations through 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.

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 ISS Calculator.

01
Calculate tax liability
This capability computes the final tax amount owed. It takes the gross amount and any applicable deductions to find the exact liability.
02
Check withholding status
This capability checks if a service requires tax to be withheld at the source. It uses the municipality and service type to return the status.
03
Get applicable rate
This capability retrieves the specific tax percentage for a service in a given municipality. It ensures your agent uses the correct local rate.

Real work

What teams actually run

Service Pricing

Calculate the total cost of a service including ISS to provide accurate quotes to clients.

Compliance Auditing

Verify that withholding was correctly applied to specific service types in various municipalities.

Expense Management

Determine the exact tax impact of service-based expenses for financial reporting.

Multi-city Operations

Manage tax calculations for businesses operating across multiple different municipalities.

Automate a task

Put ISS 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

ISS 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 ISS 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

726ms average. Fast in production.

ISS Calculator is checked daily against the live service.

Daily averagePeak 898ms

Oct 3Today

Fastest day: 509ms
Slowest day: 898ms
14-day trend: Stable-4%

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

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

ISS Calculator Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_HlSPdLjtJSxPtEgVdNPHFyH8MRO0Ac1yUuvQ55cL/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 — ISS Calculator capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "iss-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_HlSPdLjtJSxPtEgVdNPHFyH8MRO0Ac1yUuvQ55cL/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 ISS Calculator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work ISS Calculator owners hand off.

This MCP is built for professionals managing municipal service taxes and financial compliance.

01
Accountants
They hand off the repetitive task of looking up municipal ISS rates to their AI agent.
02
Tax Consultants
They use the capability to quickly verify withholding requirements for clients in different cities.
03
Financial Controllers
They use the capability to automate the calculation of tax liabilities for service providers.

FAQ

Questions ISS Calculator owners ask.

01
How do I use this MCP in Claude or Cursor?
You connect to the Vinkius catalog once, and the capabilities become available as functions for your AI client to call.
02
Can I calculate tax with deductions?
Yes, the calculate_tax_liability capability allows you to include deduction amounts to find the final taxable base.
03
Does it cover different municipalities?
Yes, the capabilities are designed to look up rates and withholding rules for specific municipalities.
04
What information do I need to provide for a tax calculation?
You typically need the municipality name, the type of service, the gross amount, and any applicable deductions.
05
Is this for calculating income tax?
No, this MCP is specifically for calculating Service Tax (ISS) based on municipal rates.
06
How can I find the tax rate for a specific city?
You can use the get_applicable_rate capability by providing the municipality name and the service type.
07
Does the calculator handle tax withholding?
Yes. Use check_withholding_status to see if the service taker is responsible for paying the tax at source.
08
Can I include deductions in my calculation?
Yes, using calculate_tax_liability, you can provide a deduction amount. The capability will only apply it if the service type allows for deductions in that municipality.

Explore

More in Finance

Connect ISS 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 tax liability

Check withholding status

Get applicable rate

What teams actually run

Service Pricing

Compliance Auditing

Expense Management

Multi-city Operations

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

ISS Calculator Connector

Claude Desktop

Accountants

Tax Consultants

Financial Controllers

How do I use this MCP in Claude or Cursor?

Can I calculate tax with deductions?

Does it cover different municipalities?

What information do I need to provide for a tax calculation?

Is this for calculating income tax?

How can I find the tax rate for a specific city?

Does the calculator handle tax withholding?

Can I include deductions in my calculation?

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