All you need is a rule, no plugins needed:

memcached:
  match:
    meta:
      uri: # the regex you need to match
   tags:
    - 'jnbfb' # if any
  exec:
    # the HTTP request to execute with method, uri, body, headers

The assumption is that memcached can talk HTTP. Change prop also supports HTCP.

There could be a set of memcached's (depending on sharding setup I guess) and the message itself needs processing before being sent out, and also needs fallback/retry if any of the memcached's fail. So I'm not sure it'd work without plugin?

@Smalyshev Any progress on this? If you specify the requirements I can help with implementing it in ChangeProp Or did you decide to go to the other direction with this?

I understood that memcache is being handled with mcrouter, but I'll double-check.