I took a gander at the source I'll wait till/if there's ever a 100% local version of this. But good luck all the same!
Take a look at the "Local Testing" section in the README of dispatch-py https://github.com/stealthrocket/dispatch-py?tab=readme-ov-f...
TLDR: python -m dispatch.test http://127.0.0.1:8000
This is just a mock implementation but it lets you test your code and experiment with the solution.