mxisd is a federated Matrix Identity Server following a cascading lookup model, using LDAP (optional) then other identity servers, including the central Matrix servers.
It is targeted to people/organisation that run their own Homeserver for a specific domain and want to publish 3PID mapping without having to rely on central servers.

Is is an implementation of the Identity Service API which aims to provide an alternative to sydent.

Follow the progress and grab the code from GitHub.