Navigate your web browser to Realter.com. Use the drop-down menu at the left to select a house that's for sale, not for sale, rented, recently sold or newly constructed. Then enter the address of the house in the search bar and search. Alternately, if you have the MLS number of the Missouri house, click on "Search by MLS#" then type the number into the search box.
Go to the Missouri Real Estate MultiList, a state-specific home database (morealestate.net). Select "Search Listings" from the menu on the left, then scroll down the page until you see a search box labeled "Listing Number." Enter the MLS listing number in the search box, then click "Search Using Selected Criteria" to find the house by MLS number. Use this method only if you know the MLS number, since you cannot search by address.
Go to MLS.com. On the state map, click on Missouri. Scroll down the page until you see the search box labeled "Search MLS Listings." Input the city, and select Missouri from the state list. Click "Search MLS Listings" to view all matching MLS listings in the city. This is useful is you don't know the exact address, or if you want to get multiple MLS listings and compare.