OpenSearch/rest-api-spec/api/indices.create.json

{
  "indices.create": {
    "documentation": "http://www.elasticsearch.org/guide/en/elasticsearch/reference/master/indices-create-index.html",
    "methods": ["PUT", "POST"],
    "url": {
      "path": "/{index}",
      "paths": ["/{index}"],
      "parts": {
        "index": {
          "type" : "string",
          "required" : true,
          "description" : "The name of the index"
        }
      },
      "params": {
        "timeout": {
          "type" : "time",
          "description" : "Explicit operation timeout"
        },
        "master_timeout": {
          "type" : "time",
          "description" : "Specify timeout for connection to master"
        }
      }
    },
    "body": {
      "description" : "The configuration for the index (`settings` and `mappings`)"
    }
  }
}