curl --request POST \
  --url https://app.autoposting.ai/api-proxy/posts/{postId}/score \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "score": 78,
    "breakdown": {
      "clarity": 85,
      "engagement": 70,
      "callToAction": 80
    },
    "suggestions": [
      "Add a question to invite replies",
      "Include relevant hashtags for discoverability"
    ]
  }
}