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Editorial Team
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Asked: 2026-05-25T10:03:08+00:00

My site is using the Facebook comments box plugin . I can access the

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My site is using the Facebook comments box plugin. I can access the comments using the graph api for my iOS app by calling:

https://graph.facebook.com/comments?ids={url}

However, if the url referenced above isn’t visited at least once in a browser I’ll get the error:

{
  error: {
    type: "Exception",
    message: "Unknown identifier, ",
  }
}

It makes sense that the url hasn’t been registered yet via the plugin. However, I might be accessing these urls in my iOS app before anyone visits them on the web. Does anyone know of a graph api call that will register the url with Facebook? If my situation were read only I would simply say there are no comments but I have the same problem when trying to post a comment.

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1 Answer

  1. Editorial Team

    You can programmatically scrape a particular page containing a social plugin by making a CURL (or similar) call to:

    http://developers.facebook.com/tools/debug?url={YOUR_URL}&format=json

    This is mentioned in the OG docs at http://developers.facebook.com/docs/opengraph/#edit although links to the older URL for the OG Linter.

    I believe linting/scraping a page such as this should register any social plugins on the page without requiring you to visit the page first.

    Edit: See also the Updating Objects section at the bottom of this doc: https://developers.facebook.com/docs/opengraph/objects/

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