QGIS Plugin to install QGIS Plugins via POST Requests.
Download the plugin here: https://plugins.gbd-consult.de/plugin/7
Once you have started the Plugin you can send Requests via POST. An Example using CURL:
curl -F "archive=path/to/plugin.zip" localhost:6789
The development server does then install the plugin in qgis and reloads it.
The Port can be set in the settings.