Add calculators
without rebuilding them.

$ curl https://api.miniwebtool.com/v1/tools/percentage-calculator/run \
    -H "Authorization: Bearer $MWT_KEY" \
    -d '{"mode":"percent_of","a":15,"b":200}'

{
  "request_id":   "01KPW8…",
  "tool":         "percentage-calculator",
  "credits_used": 1,
  "result": {
    "mode":   "percent_of",
    "a":      15,
    "b":      200,
    "result": 30
  }
}

import requests, os

r = requests.post(
    "https://api.miniwebtool.com/v1/tools/percentage-calculator/run",
    headers={"Authorization": f"Bearer {os.environ['MWT_KEY']}"},
    json={"mode": "percent_of", "a": 15, "b": 200},
    timeout=10,
)
print(r.json()["result"]["result"])  # 30

const res = await fetch(
  "https://api.miniwebtool.com/v1/tools/percentage-calculator/run",
  {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${process.env.MWT_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ mode: "percent_of", a: 15, b: 200 }),
  },
);
const { result } = await res.json();
console.log(result.result);  // 30