Instapaper 3.0.2 with x-callback-support now available

Instapaper 3.0.2 has hit the app store. This is the first version of Instapaper to support x-callback-url. Marco Arment, the developer behind Instapaper, was important to the formation of the ideas in x-callback-url, and we’re excited to see this version hit the store.

Instapaper’s integration with Terminology also represents the first “in-the-wild” use of x-callback-url’s two way callback support. If you select to lookup a word in Terminology from Instapaper, you are provided an easy way to jump right back to where your were. See Marco’s post for details.

Terminology developer documentation posted

Terminology, the first app officially supporting x-callback-url is in the store, and developer documentation has been posted by Agile Tortoise (Yes, that’s me…full disclosure). ¬†Terminology is a dictionary and thesaurus app, and support lookup of word from external apps, and also two-way communication, allowing your app to request a replacement word.

I’m starting to spread the word about x-callback-url, and hope that I can start to drum up pledges of support from some other developers in the near term. ¬†Please contact me if you are interested in adding support to your apps and have questions (info at

Here’s a demo video of Terminology’s x-callback-url support: