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Our beloved webhook debugging tool known as PostBin just got a little bit more useful. You can now include a URL in the query string when registering your PostBin callback that will get invoked when PostBin is posted to. This way you can use PostBin and still have your hook script run. Here’s an example of what it would look like:

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Notice you can just prepend your existing callback URL with a PostBin URL and a question mark. In this way, PostBin becomes a decorator to your hook scripts.

A lot of work went into this and a lot of plumbing and debugging. PostBin uses Hookah to invoke your passthrough callback, making PostBin the first real user of a Hookah instance. Hookah was rewritten in Twisted and got a lot of tweaks to make this work. Please consider using Hookah to handle asynchronous callback dispatching in your apps!

PostBin has a number of features planned, including private bins, request replaying (so you can capture events, then replay them to your passthrough endpoint for debugging), filtering, and more.

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