Trulia cannot search the MLS url. Trulia can search a url when the data is on that url. That is why the broker creates a feed, or submits their site to Trulia. An agent, nor Broker, is the owner of the MLS url and can't grant crawl permission to that url. If the broker for which your agent works does not have a feed, the agent can contact a local college that has computer programming classes and coordinate his/her efforts with a broker to get their feed up. We have an IT person on our staff who created ours.