OpenSearch/rest-api-spec/api/cluster.stats.json

{
  "cluster.stats": {
    "documentation": "http://www.elasticsearch.org/guide/en/elasticsearch/reference/master/cluster-stats.html",
    "methods": ["GET"],
    "url": {
      "path": "/_cluster/stats",
      "paths": ["/_cluster/stats", "/_cluster/stats/nodes/{node_id}"],
      "parts": {
        "node_id": {
          "type" : "list",
          "description" : "A comma-separated list of node IDs or names to limit the returned information; use `_local` to return information from the node you're connecting to, leave empty to get information from all nodes"
        }
      },
      "params": {
        "flat_settings": {
          "type": "boolean",
          "description": "Return settings in flat format (default: false)"
        },
        "human": {
            "type": "boolean",
            "description": "Whether to return time and byte values in human-readable format.",
            "default": false
        }
      }
    },
    "body": null
  }
}