Babbl Chrome Extension

Small project to create a Chrome extension that will enable a user to post long messages directly on [login to view URL] via the [login to view URL] API. [login to view URL] is a "Twitter Extender" site that allows users to type in messages that are more than 140 characters. It also provides an API that uses OAuth Echo to allow third parties to post long messages to Twitter. I wrote Babbl but am not a Javascript expert, and am not sure how to create the X-Verify-Credentials-Authorization header (required by the Babbl API) from the (at)Anywhere-related data provided by [login to view URL] (if in fact this is possible in a secure manner). The attached image shows how it should appear when the Chrome extension is active. NOTE: The extension should also work using the Tweet popup method (see the second image attached to this request). No graphical design is required, I will add an icon to the extension after the code is delivered.