CMDB API Server
The inventory CMDB started as way to track assets and some parts of configuration of these assets, and evolved (for better or for worse) to be able to manage and track non-physical assets (VMs, VIPs, etc...) and also to manage non-system configuration (service, cluster instance, etc...)
It is now a part of a larger set of loosely coupled Operations tools that we collectively refer to as NOMS: https://github.com/evernote/noms-client/wiki
The API works very well with the UI project CMDB-UI (https://github.com/isaacfinnegan/cmdb-ui) - Web-based GUI for the NOMS CMDB
More information can be found on the cmdb api wiki: https://github.com/isaacfinnegan/cmdb-api/wiki