---
name: decision-calculator
description: Execute Groundwork's 20 mathematical decision calculators with user parameters.
---

# Decision Calculator Skill

This skill allows an AI agent to execute validated quantitative calculators on Groundwork (gworky.com).

## Usage via MCP

Send a tool call to the Groundwork MCP endpoint (`/api/mcp`):
```json
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "run_calculator",
    "arguments": {
      "slug": "mortgage-refinance-calculator",
      "inputs": {
        "current_loan_balance": 350000,
        "current_interest_rate": 6.75,
        "new_interest_rate": 5.25,
        "closing_costs": 4500
      }
    }
  }
}
```