Install Albert from albertlauncher.github.io (available for Linux and macOS).
Open Albert Settings from your system tray or menu bar.
Go to the Plugins tab and enable the Python plugin loader.
Download the Albert for Todoist plugin from github.com/okb1100/albert-plugin-todoist and place it in Albert’s Python plugins directory.
Return to Albert Settings. Go to the Plugins tab, find “Todoist” in the list, and enable it.
In the plugin settings, paste your Todoist API token (find it in Todoist under the Developer tab in Settings > Integrations).
Open Albert and type td to start using it. Type td add [task name] to create new tasks.