Webhooks to process every post

I’d like to code up support for specifying remote filters that would get to process every post. When a post is sent to the server, it would get passed to the processing service(s), which would return a potentially modified message to get saved/displayed. It would also potentially trigger an incoming webhook that might add follow-on information. The configuration of the “filtering webhooks” would be similar to that of outgoing webhooks. Would anyone else be interested in this?