> ## 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.

# ActivityItem

## Fields

| Field | Type | Required | Description | Example |
| - | - | - | - | - |
| `BYOKUsageInference` | `float64` | :heavy\_check\_mark: | BYOK inference cost in USD (external credits spent) | 0.012 |
| `CompletionTokens` | `int64` | :heavy\_check\_mark: | Total completion tokens generated | 125 |
| `Date` | `string` | :heavy\_check\_mark: | Date of the activity (YYYY-MM-DD format) | 2025-08-24 |
| `EndpointID` | `string` | :heavy\_check\_mark: | Unique identifier for the endpoint | 550e8400-e29b-41d4-a716-446655440000 |
| `Model` | `string` | :heavy\_check\_mark: | Model slug (e.g., "openai/gpt-4.1") | openai/gpt-4.1 |
| `ModelPermaslug` | `string` | :heavy\_check\_mark: | Model permaslug (e.g., "openai/gpt-4.1-2025-04-14") | openai/gpt-4.1-2025-04-14 |
| `PromptTokens` | `int64` | :heavy\_check\_mark: | Total prompt tokens used | 50 |
| `ProviderName` | `string` | :heavy\_check\_mark: | Name of the provider serving this endpoint | OpenAI |
| `ReasoningTokens` | `int64` | :heavy\_check\_mark: | Total reasoning tokens used | 25 |
| `Requests` | `int64` | :heavy\_check\_mark: | Number of requests made | 5 |
| `Usage` | `float64` | :heavy\_check\_mark: | Total cost in USD (OpenRouter credits spent) | 0.015 |
| `WorkspaceID` | `*string` | :heavy\_minus\_sign: | ID of the workspace this activity is attributed to. Only present when `group_by=workspace` is passed; the response is then split per workspace. Activity recorded before workspace resolution existed is attributed to the account default workspace. | 550e8400-e29b-41d4-a716-446655440000 |