New bulkWrite(...) command for Mongo instances. As stated for the driver , this API is meant to replace the existing bulk write API on the Collection as it supports a bulk write across multiple databases and collections in a single call. The command uses the active mongosh client and replicates the API from the driver in form of Mongo().bulkWrite([ {namespace: string | Collection /** '<db>.<collection>' */,name: ‘<operation>’,/* Other operation-specific props */} , ...]); See also: https://github.com/mongodb-js/mongosh/pull/2416