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

{
  "indices.open": {
    "documentation": "http://www.elasticsearch.org/guide/reference/api/admin-indices-open-close/",
    "methods": ["POST"],
    "url": {
      "path": "/{index}/_open",
      "paths": ["/{index}/_open"],
      "parts": {
        "index": {
          "type" : "string",
          "description" : "The name of the index"
        }
      },
      "params": {
        "timeout": {
          "type" : "time",
          "description" : "Explicit operation timeout"
        }
      }
    },
    "body": null
  }
}