> ## 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 ```go theme={null} import ( "github.com/OpenRouterTeam/go-sdk/models/operations" ) value := operations.SearchSurfaceServerTool // Open enum: custom values can be created with a direct type cast custom := operations.SearchSurface("custom_value") ``` ## Values | Name | Value | | ------------------------- | ----------- | | `SearchSurfaceServerTool` | server-tool | | `SearchSurfacePlugin` | plugin |