curl --request POST \
  --url https://finceptbackend.share.zrok.io/quantlib/numerical/linalg/matmul \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "A": [
    [
      1,
      2
    ],
    [
      3,
      4
    ],
    [
      5,
      6
    ]
  ],
  "B": [
    [
      7,
      8,
      9
    ],
    [
      10,
      11,
      12
    ]
  ]
}
'

{
  "success": true,
  "data": {
    "result": [
      [
        27,
        30,
        33
      ],
      [
        61,
        68,
        75
      ],
      [
        95,
        106,
        117
      ]
    ]
  }
}