A repository is a receptacle - a place where things are stored - whether that be a storeroom or a human being (with information) and as such there is no antonym.
The Repository was created in 1815.
The Presidential library is a repository for all his written works and correspondence.NARA is a repository for all military records.A repository can be a library or museum.
Ackermann's Repository ended in 1829.
Ackermann's Repository was created in 1809.
Theological Repository was created in 1769.
Theological Repository ended in 1788.
The Ladies' Repository ended in 1876.
The Ladies' Repository was created in 1841.
Monthly Repository was created in 1806.
Monthly Repository ended in 1838.
The Medical Repository was created in 1797.
The Medical Repository ended in 1824.