Pushpin
Proxy server for adding push to your API
...Pushpin is a server-side implementation detail. An existing real-time API can be migrated to or away from Pushpin without breaking clients. Since Pushpin is a proxy server, the backend can be written in any language. Convenience libraries are available to make integration easy. With Pushpin, API management systems can manage real-time endpoints. Authentication, analytics, etc. work as you'd expect. Pushpin listens on port 7999. Edit the routes file to point traffic to your backend. Make an endpoint on the backend that responds with instructional HTTP headers.