> ## 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.

# ServerToolOutputName

## Fields

| Field | Type | Required | Description | Example |
| - | - | - | - | - |
| `APIFormat` | [components.ServerToolOutputNameAPIFormat](../../models/components/servertooloutputnameapiformat.mdx) | ✅ | N/A | |
| `Name` | `*string` | ➖ | Anthropic Messages `server_tool_use` block `name`, when the call surfaces as one | web\_search |
| `Type` | `string` | ✅ | Output item `type` on Responses, content block `type` on Anthropic Messages, `reasoning_details[].type` on Chat Completions | web\_search\_call |