Commonwealth Catalog

The Commonwealth Catalog will remain out of service until at least mid-September. While requesting material is disabled, you are still able login and view existing requests.

While many of ComCat's 350 member libraries are working toward safe resumption of operations locally, they are not yet ready to begin ComCat lending across the state.

While ComCat is offline, you can still access many online and some physical services offered by your local library. Check in with your library to see what is available!

If you can't find it in the CW MARS catalog, you can search other libraries across the Commonwealth of Massachusetts via the Commonwealth Catalog.

Requests will be delivered to your local library for pickup.

Log in to place, manage, and cancel requests in the statewide Commonwealth Catalog.

Need Help? Visit the Commonwealth Catalog FAQ or contact your local library for assistance.

Funding for the Commonwealth Catalog is provided by the Massachusetts Board of Library Commissioners and the Institute of Museum and Library Services.