Quack protocol turns DuckDB into a client-server system, enabling connections between multiple DuckDB instances

DuckDB introduced Quack, an HTTP-based client/server protocol that lets one DuckDB instance serve multiple DuckDB clients.

Quack supports authentication, concurrent reads and writes, and fast bulk data transfer for analytics workloads.

The feature ships as an extension in DuckDB v1.5.2, with tighter DuckLake integration planned.

A formal release is targeted for DuckDB v2.0 later this fall, expanding DuckDB beyond embedded local use.