RGB画像ピクセルを輝度加重でグレースケール変換

curl -X POST https://api.kit.forhosting.com/image/grayscale-convert \
  -H "Authorization: Bearer $KIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"samples":[{"r":255,"g":0,"b":0},{"r":0,"g":128,"b":255}]}'

const res = await fetch("https://api.kit.forhosting.com/image/grayscale-convert", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.KIT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "samples": [
      {
        "r": 255,
        "g": 0,
        "b": 0
      },
      {
        "r": 0,
        "g": 128,
        "b": 255
      }
    ]
  })
});
const { task_id } = await res.json();

import os, requests

res = requests.post(
    "https://api.kit.forhosting.com/image/grayscale-convert",
    headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
    json={
    "samples": [
        {
            "r": 255,
            "g": 0,
            "b": 0
        },
        {
            "r": 0,
            "g": 128,
            "b": 255
        }
    ]
},
)
task_id = res.json()["task_id"]

<?php
$res = file_get_contents("https://api.kit.forhosting.com/image/grayscale-convert", false, stream_context_create([
  "http" => [
    "method"  => "POST",
    "header"  => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
    "content" => '{"samples":[{"r":255,"g":0,"b":0},{"r":0,"g":128,"b":255}]}',
  ],
]));
$task = json_decode($res, true);

body := bytes.NewBufferString(`{"samples":[{"r":255,"g":0,"b":0},{"r":0,"g":128,"b":255}]}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/image/grayscale-convert", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)