curl -X POST https://platform.streampixel.io/api/v1/projects/664f1a2b3c4d5e6f7a8b9c0d/active-build \
  -H "x-api-key: $STREAMPIXEL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"buildId": "66a0b1c2d3e4f5a6b7c8d9e0"}'

const res = await fetch(
  'https://platform.streampixel.io/api/v1/projects/664f1a2b3c4d5e6f7a8b9c0d/active-build',
  {
    method: 'POST',
    headers: { 'x-api-key': process.env.STREAMPIXEL_API_KEY, 'Content-Type': 'application/json' },
    body: JSON.stringify({ buildId: '66a0b1c2d3e4f5a6b7c8d9e0' }),
  }
);
if (res.status === 409) console.log('not processed yet:', (await res.json()).message);

import os, requests

r = requests.post(
    "https://platform.streampixel.io/api/v1/projects/664f1a2b3c4d5e6f7a8b9c0d/active-build",
    headers={"x-api-key": os.environ["STREAMPIXEL_API_KEY"]},
    json={"buildId": "66a0b1c2d3e4f5a6b7c8d9e0"},
)
print(r.status_code, r.json())

{
  "projectId": "664f1a2b3c4d5e6f7a8b9c0d",
  "name": "Showroom",
  "region": "Europe",
  "enabled": true,
  "buildId": "66a0b1c2d3e4f5a6b7c8d9e0",
  "queued": true,
  "previousBuildStatus": "Ready",
  "note": "Distribution to the region's streaming servers is queued; poll GET /projects/{id}/files/{fileId}/status until it is Approved."
}

{
  "code": "CONFLICT",
  "message": "Build is \"Extracting & Scanning\" and cannot be set active yet. It must have been processed (Ready or Approved); failed or rejected builds need a new upload.",
  "status": "Extracting & Scanning"
}