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Connect Currency Math Engine 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. Stop floating-point errors from breaking your billing payloads.

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 · 1 capability

We ship only the actions that matter.

Capability set01 / 01

01

1 capability in this set.

Part of 1 available through currency.js.

  1. 01

    Calculate currency

    This capability performs strict integer-based financial math to prevent rounding errors. You provide a base amount, an operation like add or multiply, and a second value to get a precise result.

Real work

What teams actually run

01

Invoice Generation

An agent calculates line items and totals to create a perfect invoice payload.

02

Shopping Cart Totals

The agent sums up products, shipping, and taxes without losing pennies in the process.

03

Discount Application

Your agent calculates percentage-based or flat discounts on a subtotal.

04

Tax Compliance

The engine handles the math for various tax rates to ensure the final amount is correct.

Automate a task

Put currency.js 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

currency.js 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 currency.js 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

890ms average. Fast in production.

currency.js is checked daily against the live service.

Daily averagePeak 1038ms
Oct 3Today
Fastest day
693ms
Slowest day
1038ms
14-day trend
Improving-10%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 1 capability arrives 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 currency.js, so you can see the experience inside your AI.

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

currency.js Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_5NKbd1XQQAcf3ixbQFgDqA1EW0unjlSmIiGFqbYs/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 — currency.js capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "currency-math-engine-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_5NKbd1XQQAcf3ixbQFgDqA1EW0unjlSmIiGFqbYs/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 currency.js in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work currency.js owners hand off.

This MCP is built for developers and automated agents handling real-world money.

  • 01

    Fintech Developers

    They use it to ensure agent-driven transactions don't fail due to rounding errors.

  • 02

    E-commerce Engineers

    They hand off cart totals and tax calculations to the agent for processing.

  • 03

    Automation Specialists

    They build workflows where agents must interact with accounting software like Xero or Shopify.

FAQ

Questions currency.js owners ask.

  • 01

    How does this MCP prevent math errors?

    It uses integer-based arithmetic instead of the floating-point math that AI agents typically use. This prevents the tiny decimal errors that occur during standard calculations.

  • 02

    Which AI clients can use this MCP?

    You can use this with any MCP-compatible client, including Claude, Cursor, Windsurf, and VS Code.

  • 03

    Will this help with Stripe or Shopify integrations?

    Yes. It ensures that the financial payloads your agent generates are mathematically perfect, which helps prevent these platforms from rejecting the data.

  • 04

    What operations can the engine perform?

    The engine supports addition, subtraction, multiplication, division, and formatting.

  • 05

    Do I need to host this myself?

    No. Vinkius hosts and manages the MCP for you, so it is ready to use as soon as you connect it.

  • 06

    Why can't the LLM do this math?

    LLMs predict the next logical token; they don't use internal ALU processors for math. This leads to hallucinations in complex decimal arithmetic.

  • 07

    Does it support different currencies?

    Yes, it handles any currency format seamlessly by focusing strictly on the numerical value representation.

  • 08

    What operations are supported?

    Addition, subtraction, multiplication, and division.

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