Hi btj
Please refer to this thread where I answered a similar question
https://discuss.tidbyt.com/t/clarity-on-sdk-limitations/
Essentially you can run pixlet in a way that is serving a new webp render each time you access it (localhost:port when you are testing)
This allows it to cache api data as seen in the bitcoin tracker example.
I wrote some Mac OS shell script that will curl the local hosted Pixlet server and then capture the webp image using grep.
I then use a web request to send this to the tidbyt api.
Let me know if this could be useful and I can share it.
In the future, Tidbyt plans to host custom apps themselves so this process isn’t necessary, but will be useful for super customized use cases.