> ## 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 ```typescript theme={null} import { ServerToolSupportedApiFormat } from "@openrouter/sdk/models"; let value: ServerToolSupportedApiFormat = "responses"; // Open enum: unrecognized values are captured as Unrecognized ``` ## Values ```typescript theme={null} "responses" | "chat-completions" | "anthropic-messages" | Unrecognized ```