> ## 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. # SearchSurface OpenRouter search benchmarks only: filter by the request surface the lane ran on. ## Example Usage ```typescript theme={null} import { SearchSurface } from "@openrouter/sdk/models/operations"; let value: SearchSurface = "server-tool"; // Open enum: unrecognized values are captured as Unrecognized ``` ## Values ```typescript theme={null} "server-tool" | "plugin" | Unrecognized ```