Elasticsearch query API

List all indices:
  GET /_cat/indices


List all field in index:

  GET /rules-test

List all documents(records) in index:

   GET /rules-test/_search/

Get document by ID:

   GET /rules-test/_doc/cJG_UnEB1e0J32pjx0pG



Count documents:
   GET /rules-test/_count?q=user:kimchy