title: Unable to post comment using Facebook API
body: <p>I am playing around with the Facebook API, trying to comment on items in my news feed. I am using the Graph API explorer to run these tests.</p>
  
  <p>For example, a friend on Facebook has shared a link. I can see the ID of the object in the URL:</p>
  
  <p><code>https://www.facebook.com/########/posts/362739827093735</code></p>
  
  <p>If I then try to comment on this item ID using the Graph API explorer, posting to:</p>
  
  <p><code>https://graph.facebook.com/362739827093735/comments</code></p>
  
  <p>I get:</p>
  
  <pre><code>{
    "error": {
      "message": "(#200) Cannot access object_id: 362739827093735", 
      "type": "OAuthException", 
      "code": 200
    }
  }
  </code></pre>
  
  <p>I'm not sure why I'm receiving this error as I am sure that I have set the correct permissions in the API explorer:</p>
  
  <p><img src="https://i.stack.imgur.com/EJMqr.png" alt="Permissions"></p>
  
  <p>I have tried this on various items in my news feed and most of them have this issue. Can anybody tell me why?</p>
  
  <p><strong>Update:</strong></p>
  
  <p>Right, so if I use the author ID along with the fbid, like so:</p>
  
  <p><code>https://graph.facebook.com/100000383678807_362739827093735/comments</code></p>
  
  <p>I move on to this error (despite having all the right permissions!):</p>
  
  <pre><code>{
    "error": {
      "message": "(#210) User not visible", 
      "type": "OAuthException", 
      "code": 210
    }
  }
  </code></pre>