> ## 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. # ServerToolPrice ## Fields | Field | Type | Required | Description | Example | | - | - | - | - | - | | `MaxUnitsPerCall` | `int64` | ✔️ | N/A | | | `Mode` | `*string` | ✔️ | The `parameters.mode` this price applies to; null for prices that do not depend on the mode. A request bills exactly one `request` row | auto | | `Price` | `string` | ✔️ | USD per unit, as a decimal string | 0.007 | | `Unit` | `string` | ✔️ | N/A | request |