> ## 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.

# DecisionsRequest

## Fields

| Field | Type | Required | Description | Example |
| - | - | - | - | - |
| `Model` | `string` | :heavy\_check\_mark: | N/A | |
| `Provider` | optionalnullable.OptionalNullable\[[components.ProviderPreferences](../../models/components/providerpreferences.mdx)] | :heavy\_minus\_sign: | N/A | \{<br />"allow\_fallbacks": true<br />} |
| `Questions` | map\[string][components.Questions](../../models/components/questions.mdx) | :heavy\_check\_mark: | N/A | |
| `SessionID` | `*string` | :heavy\_minus\_sign: | A unique identifier for grouping related requests (e.g., a conversation or agent workflow). Used for observability grouping in Broadcast and private logging; never sent to the provider. If provided in both the request body and the x-session-id header, the body value takes precedence. Maximum of 256 characters. | session-1234 |
| `State` | [components.State](../../models/components/state.mdx) | :heavy\_check\_mark: | The content to evaluate: a plain string, or a JSON object or array of related context. | |
| `Trace` | [\*components.TraceConfig](../../models/components/traceconfig.mdx) | :heavy\_minus\_sign: | Metadata for observability and tracing. Known keys (trace\_id, trace\_name, span\_name, generation\_name, parent\_span\_id) have special handling. Additional keys are passed through as custom metadata to configured broadcast destinations. | \{<br />"trace\_id": "trace-abc123",<br />"trace\_name": "my-app-trace"<br />} |
| `User` | `*string` | :heavy\_minus\_sign: | N/A | |