MCP For Claude Marketplace
Percentage Calculation Engine

Percentage Calculation Engine MCP Connector for Claude

F

Stop LLMs from miscalculating discounts and interest. Deterministically calculate exact percentages and relative increases.

2 tools Official Updated Jun 28, 2026 Official Vinkius Partner
More Details Connect to Claude

LLMs frequently fail when applying layered financial math, such as calculating a 15% discount followed by a 20% tax. They guess the answer based on training data. This MCP brings pure, native Javascript logic to percentage math.

The Superpowers

  • Flawless Financials: Ensure your AI calculates invoice discounts, VAT taxes, and interest correctly every single time.
  • Absolute Determinism: No stochastics. Just native mathematical evaluation executed at the edge.
arithmeticfinancial-mathdeterminismvat-calculationdiscount-logicprecision-math

2 tools expose this connector's capabilities to your AI agent.

calculate_increase_by

Increases or decreases a value by X percent deterministically (use negative percent for discount)

calculate_percent_of

Pass the base value and the percentage to compute. Essential for discount calculations, tax rates, and financial reports. Calculates X percent of a total value deterministically

See how to talk to your AI agent using Percentage Calculation Engine.

What is exactly 15.5% of $2,500.00?

✅ **Percentage Extracted:** `$387.50`

Add a 20% VAT tax rate to the baseline price of $500.

✅ **Increased Value:** The final price with VAT is `$600.00`.

Apply a 10% coupon discount to the shopping cart total of $1000.

✅ **Decreased Value:** The new cart total is `$900.00`.

Yes, by passing a negative percentage.

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