curl --request POST \
  --url https://api.unprice.dev/v1/customer/can \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "customerId": "cus_1H7KQFLr7RepUyQBKdnvY",
  "featureSlug": "tokens",
  "metadata": {
    "action": "create",
    "country": "US"
  }
}
'

{
  "success": true,
  "message": "<string>",
  "deniedReason": "RATE_LIMITED",
  "cacheHit": true,
  "remaining": 123
}