A major product of the nightly processing of LSST images is a world-public stream of alerts from transient, variable, and moving sources. Science users may access these alerts through third-party community brokers, which will receive the LSST alerts, add scientific value, and redistribute them to the scientific community.
This document is a call for Letters of Intent (LOIs) to propose a community broker, as described in “Plans and Policies for LSST Alert Distribution” [LDM-612].