HTML to image.
One API call.

curl -X POST https://renderpix.dev/v1/render \
  -H "X-API-Key: rpx_your_key" \
  -H "Content-Type: application/json" \
  -d '{"html":"<h1>Hello</h1>","width":1200,"height":630}' \
  -o output.png

const res = await fetch('https://renderpix.dev/v1/render', {
  method: 'POST',
  headers: { 'X-API-Key': 'rpx_your_key', 'Content-Type': 'application/json' },
  body: JSON.stringify({ html: '<h1>Hello</h1>', width: 1200, height: 630 }),
});
const buf = await res.arrayBuffer();

import requests
r = requests.post('https://renderpix.dev/v1/render',
    headers={'X-API-Key': 'rpx_your_key'},
    json={'html': '<h1>Hello</h1>', 'width': 1200})
with open('out.png','wb') as f: f.write(r.content)