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

{
  "indices.create": {
    "documentation": "http://elasticsearch.org/guide/reference/mapping/",
    "methods": ["PUT", "POST"],
    "url": {
      "path": "/{index}",
      "paths": ["/{index}"],
      "parts": {
        "index": {
        }
      },
      "params": {
        "index": {
        },
        "timeout": {
        }
      }
    },
    "body": {
    }
  }
}