EventSub webhook: Echo Dot TTS when followed Twitch channels go live
You need to provide your Twitch username, the hostname of your node-red server, your Twitch developer Client-ID, the name of your Echo Dot device, and then need to set up a proxy in the Account node to automatically have your Alexa login cookie refreshed.
Note that this can be used as a template for responding in any way - not just Echo Dot TTS - to WebSub / PubSubHubbub topics offered by any publishers - not just Twitch. **Edit: They moved to EventSub, so I updated this gist accordingly
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