If I have a url that is used for getting messages and I create it like so: http://www.mydomain.com/somelonghash123456etcetc and this URL allows for other services to POST messages to. Is it possible for a search engine robot to find it? I don't want to have it in my robots.txt because that will expose it already to anybody that sees the robots file.
Of course I will put in other authentication in the app, but not having anyone discovering that URL is the first step.
Any common methods?