curl --request POST \
  --url https://api.withsplendor.com/v1/ingest/sources/{source_key}/asset-uploads \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-splendor-tenant-id: <x-splendor-tenant-id>' \
  --data '
{
  "assets": [
    {
      "content_type": "<string>",
      "object_size_bytes": 1,
      "filename": "<string>"
    }
  ]
}
'

{
  "assets": [
    {
      "bucket": "acme-uploads",
      "expires_at": "2026-01-15T09:30:00Z",
      "image_reference": "s3://acme-uploads/sources/catalog/hosted/2026/07/01/abc123.png",
      "key": "sources/catalog/hosted/2026/07/01/abc123.png",
      "required_headers": {
        "content-type": "image/png"
      },
      "upload_session_id": "ups_01H8Z4",
      "upload_url": "https://acme-uploads.s3.amazonaws.com/..."
    }
  ]
}