The most basic kind of information you can get is the cluster information from the root index and the Indices API:
The response contains:
name- Name of the node.
cluster_name- Name of the cluster.
server- Server version string.
versions- Versions of the internal libraries.
options- Currently active options.
nodes- List of cluster nodes.
You can retrieve information about the Xapiand server usage and state, by using
This returns a Prometheus compatible response with a bunch of useful metrics.