> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-a46887cf.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# FusionServerToolOpenRouter - Go SDK

> FusionServerToolOpenRouter type definition

<Warning>
  The Go SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/go-sdk/issues).
</Warning>

OpenRouter built-in server tool: fans out the user prompt to a panel of analysis models, then asks a judge model to summarize their collective output as structured JSON the outer model can synthesize from.

## Fields

| Field        | Type                                                                                                             | Required             | Description                                          | Example                                                                                                   |
| ------------ | ---------------------------------------------------------------------------------------------------------------- | -------------------- | ---------------------------------------------------- | --------------------------------------------------------------------------------------------------------- |
| `Parameters` | [\*components.FusionServerToolConfig](/client-sdks/go/api-reference/models/fusionservertoolconfig)               | :heavy\_minus\_sign: | Configuration for the openrouter:fusion server tool. | `{"analysis_models": ["~anthropic/claude-opus-latest","~openai/gpt-latest","~google/gemini-pro-latest"]}` |
| `Type`       | [components.FusionServerToolOpenRouterType](/client-sdks/go/api-reference/models/fusionservertoolopenroutertype) | :heavy\_check\_mark: | N/A                                                  |                                                                                                           |