The screenshot API
that's completely free

const response = await fetch('https://pageshot.site/v1/screenshot', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    url: 'https://example.com',
    width: 1920,
    height: 1080,
    full_page: true,
    format: 'png'
  })
});

const buffer = Buffer.from(await response.arrayBuffer());
fs.writeFileSync('screenshot.png', buffer);

import requests

response = requests.post('https://pageshot.site/v1/screenshot',
    json={
        'url': 'https://example.com',
        'width': 1920,
        'height': 1080,
        'full_page': True,
        'dark_mode': True,
        'format': 'png'
    }
)

with open('screenshot.png', 'wb') as f:
    f.write(response.content)

using var client = new HttpClient();

var payload = new {
    url = "https://example.com",
    width = 1920, height = 1080,
    full_page = true, dark_mode = true
};

var response = await client.PostAsJsonAsync(
    "https://pageshot.site/v1/screenshot", payload);

var bytes = await response.Content.ReadAsByteArrayAsync();
await File.WriteAllBytesAsync("screenshot.png", bytes);