EGAD is a python/bottle application whose purpose is to act as a proxy in front of a graphite server and allow modification and extension of the API provided by it. It does this with a plugin system that allows easy extensibility. For each API call to graphite if a plugin claims the request it is then allowed to respond how it sees fit. The current use-case is to fix-up certain types of queries to work the way a naive user would expect them to before passing them off to graphite and relaying the results back to the requester. If no plugin claims a request then it is transparently proxied to graphite and the results returned without any changes to the content.

EGAD allows developers to extend the functionality of their metrics querying engine that rely upon graphite in a way that doesn't involve modifying the graphite source or breaking compatibility with any existing graphite tools.