Curious as to the primary use case here. Is scheduling things really that challenging? Most web development frameworks have this built in. In Rails, for example, one can use Sidekiq or delayed_job to postpone a task for later. Iron.io's IronWorker is another product that enables you to schedule tasks. In this instance though, you can't even schedule a task, you just schedule an API callback. Just confused as to why this is a challenge.
The Nifty