Provide a webhook to pushover gateway
It would be great if Pushover users could create webhook receiver URLs bound to Pushover Channels to receive webhook payloads that can be transformed then sent to pushover notifications. A simple JSON extractor could be use to map data received in the JSON to payload variables which can be quoted in Pushover strings
You can limit the number of webhook events / hour / day etc and use paid plans to control use.
A Free plan should at least accept say 10-20 webhooks a day for example.