Gephi has a streaming plugin, that can provide and accept JSON-graph-data in a streaming fashion.

Make sure to install the plugin firsrt and activate it for your workspace (there is a new "Streaming"-tab besides "Layout"), right-click "Master"→"start" to start the server.

You can provide your workspace name (you might want to rename it before you start thes streaming), otherwise it defaults to workspace0

The default Gephi-URL is http://localhost:8080, resulting in http://localhost:8080/workspace0?operation=updateGraph

You can also configure it in conf/neo4j.conf via apoc.gephi.url=url or apoc.gephi.<key>.url=url