> ## 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.

# ExtractionAsset

An image or PDF sent once and referenced by its key in the `assets` map. `data_base64` is the file in standard base64 with no `data:` prefix. Which formats are read is model-specific: a format the model cannot read fails with a 400.

## Example Usage

```typescript theme={null}
import { ExtractionAsset } from "@openrouter/sdk/models";

let value: ExtractionAsset = {
  dataBase64: "<value>",
  format: "jpeg",
};
```

## Fields

| Field | Type | Required | Description |
| - | - | - | - |
| `dataBase64` | *string* | ✔️ | N/A |
| `format` | [models.ExtractionAssetFormat](../models/extractionassetformat.mdx) | ✔️ | N/A |
| `type` | [models.ExtractionAssetType](../models/extractionassettype.mdx) | ➖ | N/A |