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Last active Sep 18, 2017
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Used Guids, share the love.

Used Guid Reporting

Ever wondered if that that GUID you're about to use has already been consumed?


Well you should. Check the twitter feed -, and start reporting your usage of GUIDs. It's the right thing to do.

Throw away those old paper based systems.

Nick's complete post on this.

Web Site

API endpoint


  1. Supply the guid you would like to use/reserve.
  2. Get a response
  • Either
    • 200 ok, you're set.
    • 4xx, 5xx something went wrong, see the response message.


curl \
    -d Guid="64b798cb-1013-48bb-8f30-474e35fbba7a" \
    -d UsedBy="CurlTest" \


ASP.NET Web API on AppHarbor, TweetSharp Nuget package

More Usage Samples

Message Sample (e.g. fiddler)


Content-Type: application/json; charset=utf-8
X-Requested-With: XMLHttpRequest

Request Body:

{ "Guid":"64b798cb-1013-48bb-8f30-474e35fbba7a" , "UsedBy":"Your Name" }

jQuery ajax post exmaple:

        type: 'POST',
        dataType: 'json',
        contentType: 'application/json; charset=utf-8',
        url: '',
        data: JSON.stringify({ Guid: '*your_guid*', UsedBy: '*your_name*' })
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