JavaScript Math Connector for AI agents.
2 live capabilities
Get precise financial math and discount calculations every time.
Waiting for input…
Why people use JavaScript Math
Percentage Calculation Engine for Accurate Financial Tax Math
This Connector changes that by letting your AI agent do the math correctly the first time. Instead of you doing the math, the agent calls the Javascript logic to get the exact figure. You get the right answer instantly without leaving your chat window.
What Vinkius changes
Your AI stops guessing and starts calculating with 100% accuracy.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 5,900+ Connectors
- Real-world use case 01
Retail Discounting
A shop owner asks to apply a 15% holiday discount and 8% sales tax to a $200 item.
- Real-world use case 02
Tax Filing
An accountant needs to know the exact VAT on a $4,500 invoice with a 20% rate.
- Real-world use case 03
Loan Interest
A user wants to see how a $10,000 loan grows with a 5% annual increase.
Complete set · 2capabilities
The complete JavaScript Math capability set.
These are the exact actions your AI can choose when you ask it to work with JavaScript Math.
01—02
2 capabilities in this set.
Part of 2 available through JavaScript Math.
- 01 Capability
Calculate increase by
Increases or decreases a value by a specific percentage. Use negative numbers to apply discounts.
- 02 Capability
Calculate percent of
Computes a specific percentage of a base value. Use this for taxes, commissions, or partial totals.
Set up in minutes
One URL. Then ask JavaScript Math to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use JavaScript Math from the conversation.
Choose your client
Live previewAdvanced clients IDE · CLI
Claude · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_ttJ13k8D00YxXRgwTrEjCYGv4nA6JgPMQz340RM2/mcp - Step 01
Open Connectors
In Claude Web or Claude Desktop, open Settings and choose Connectors.
- Step 02
Add the URL
Choose Add custom connector, name it JavaScript Math, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable JavaScript Math for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_ttJ13k8D00YxXRgwTrEjCYGv4nA6JgPMQz340RM2/mcp - Step 01
Open MCP settings
On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
- Step 02
Add the URL
Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the JavaScript Math URL.
- Step 03
Save and start
Save the connection and enable JavaScript Math in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"percentage-calculation-engine": {
"url": "https://edge.vinkius.com/vk_preview_ttJ13k8D00YxXRgwTrEjCYGv4nA6JgPMQz340RM2/mcp"
}
}
}- Step 01
Open MCP Settings
Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
- Step 02
Add the server config
Paste the JSON configuration above into the mcp.json file that opens
- Step 03
Save the file
Cursor will automatically detect the new Connector
- Step 04
Start using JavaScript Math
Open Agent mode in chat and ask: "Using JavaScript Math, help me...". 2 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"percentage-calculation-engine": {
"url": "https://edge.vinkius.com/vk_preview_ttJ13k8D00YxXRgwTrEjCYGv4nA6JgPMQz340RM2/mcp"
}
}
}- Step 01
Create MCP config
Create a .vscode/mcp.json file in your project root
- Step 02
Add the server config
Paste the JSON configuration above
- Step 03
Enable Agent mode
Open GitHub Copilot Chat and switch to Agent mode using the dropdown
- Step 04
Start using JavaScript Math
Ask Copilot: "Using JavaScript Math, help me...". 2 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"percentage-calculation-engine": {
"url": "https://edge.vinkius.com/vk_preview_ttJ13k8D00YxXRgwTrEjCYGv4nA6JgPMQz340RM2/mcp"
}
}
}- Step 01
Open MCP Settings
Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
- Step 02
Add the server
Paste the JSON configuration above into mcp_config.json
- Step 03
Save and reload
Windsurf will detect the new server automatically
- Step 04
Start using JavaScript Math
Open Cascade and ask: "Using JavaScript Math, help me...". 2 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"percentage-calculation-engine": {
"url": "https://edge.vinkius.com/vk_preview_ttJ13k8D00YxXRgwTrEjCYGv4nA6JgPMQz340RM2/mcp"
}
}
}- Step 01
Open Cline MCP Settings
Click the Connectors icon in the Cline sidebar panel
- Step 02
Add remote server
Click "Add Connector" and paste the configuration above
- Step 03
Enable the server
Toggle the server switch to ON
- Step 04
Start using JavaScript Math
Ask Cline: "Using JavaScript Math, help me...". 2 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add percentage-calculation-engine --transport http "https://edge.vinkius.com/vk_preview_ttJ13k8D00YxXRgwTrEjCYGv4nA6JgPMQz340RM2/mcp"- Step 01
Install Claude Code
Run npm install -g @anthropic-ai/claude-code if not already installed
- Step 02
Add the Connector
Run the command above in your terminal
- Step 03
Verify the connection
Run claude mcp to list connected servers, or type /mcp inside a session
- Step 04
Start using JavaScript Math
Ask Claude: "Using JavaScript Math, show me...". 2 tools are ready
Where the request belongs
Work JavaScript Math can move forward.
This is for anyone who handles money. If you are tired of your AI hallucinating invoice totals or messing up retail pricing, this is for you.
Accountant
Checking complex tax filings and interest rates for clients.
E-commerce Manager
Calculating tiered discounts and shipping costs for online stores.
Financial Analyst
Verifying growth percentages and ROI figures for quarterly reports.
Build the capability set
Add more capabilities.
Each Connector adds new actions and data without changing how you work.
Browse ConnectorsCurrency Math Engine
Stop financial calculation errors. Perform strict integer-based currency math for invoices, taxes, and cart totals.
Deterministic Fair-Share Tip Splitter
Transform your AI into a hyper-precise ledger. Mathematically split complex restaurant bills, proportionally distribute taxes and tips, and resolve fractional penny discrepancies instantly.
Fundamental Math
A deterministic, zero-latency mathematical engine for exact calculations. Safely compute percentages, square roots, factorials, and the rule of three completely local.
Monetary Correction Engine
Calculate precise financial monetary corrections with compound or simple interest securely local.
Exact Decimal Currency Calculator
Perform error-free financial arithmetic using integer-based cent calculations.
Finance Toolkit
Empower your AI agents to compute complex financial formulas. Instantly calculate ROI, compound interests, and SAC/Price amortization tables local.
Bring your own AI
Change the model, client or framework. Keep JavaScript Math connected.
-
Claude -
ChatGPT -
Gemini -
Cursor -
VS Code -
Windsurf -
ZCode -
Cline -
Zed -
Continue -
Kiro -
Roo Code -
Zencoder -
Goose -
Void -
Augment Code -
Amp -
Qodo -
Tabnine -
Pieces -
Sourcegraph Cody -
JetBrains -
Warp -
Amazon Q -
Antigravity -
BoltAI -
Raycast -
Jan -
LM Studio -
AnythingLLM -
Open WebUI -
Msty -
Cherry Studio -
LibreChat -
TypingMind -
Chorus -
5ire -
n8n -
LangChain -
LlamaIndex -
CrewAI -
Vercel AI SDK
Before you connect
Questions about JavaScript Math.
The practical details behind the request, access and result.
How does the Percentage Calculation Engine help with my taxes?
It ensures your AI client calculates exact tax amounts like VAT or sales tax every time. Instead of the AI guessing the percentage, it uses real math logic to give you the correct figure.
Can I use the Percentage Calculation Engine for retail discounts?
Yes. It is perfect for calculating discounts on items. You can ask your agent to apply a percentage off a price, and it will give you the exact final amount.
Will the Percentage Calculation Engine make my AI stop hallucinating numbers?
Yes. Because it uses Javascript logic instead of the AI's internal memory to do math, it provides deterministic results. The numbers will be correct every single time.
Is the Percentage Calculation Engine good for interest rates?
It is great for calculating interest growth or decay. You can tell your agent to increase a value by a certain percentage, and it will handle the calculation perfectly.
Do I need to be a math expert to use this Connector?
Not at all. You just talk to your AI client normally. You ask for the math you need, and the Connector handles the technical calculation in the background.
Can it handle multiple discounts at once?
Yes, it can handle layered math. You can ask for multiple sequential changes, and the capability will process them one by one to ensure the final total is accurate.
Can it calculate discounts?
Yes, by passing a negative percentage.
Is it deterministic?
Absolutely. Pure math evaluation local.
Does it support tax addition?
Yes, simply use the increase_by function.
One connection away
Give your agent a direct line to JavaScript Math.
Connect JavaScript Math once. Keep it beside 5,900+ managed Connectors when the next task needs more.
Explore every Connector No credit card required · Free tier available