curl --request POST \
  --url https://api.iotools.cloud/v1/tool/matrix-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "matrixSize": "2",
  "operation": "add",
  "outputFormat": "fraction",
  "A11": "2",
  "A12": "1",
  "A21": "0",
  "A22": "3",
  "B11": "1",
  "B12": "2",
  "B21": "3",
  "B22": "4"
}
'

{
  "tool": "matrix-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "result": [
      [
        "3",
        "3"
      ],
      [
        "3",
        "7"
      ]
    ],
    "steps": ""
  },
  "credits_used": 3,
  "credits_remaining": null
}