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

{
  "indices.update_aliases": {
    "documentation": "http://www.elasticsearch.org/guide/reference/api/admin-indices-aliases/",
    "methods": ["POST"],
    "url": {
      "path": "/_aliases",
      "paths": ["/_aliases"],
      "parts": {
        "index": {
          "type" : "list",
          "description" : "A comma-separated list of index names to filter aliases"
        }
      },
      "params": {
        "timeout": {
          "type" : "time",
          "description" : "Request timeout"
        }
      }
    },
    "body": {
      "description" : "The definition of `actions` to perform",
      "required" : true
    }
  }
}