> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # ServerToolSupportedAPIFormat ## Example Usage ```python theme={null} from openrouter.components import ServerToolSupportedAPIFormat # Open enum: unrecognized values are captured as UnrecognizedStr value: ServerToolSupportedAPIFormat = "responses" ``` ## Values This is an open enum. Unrecognized values will not fail type checks. * `"responses"` * `"chat-completions"` * `"anthropic-messages"`