> ## 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. # DecisionsImageAsset An image sent once and referenced by its key in the `assets` map. `data_base64` is the PNG or JPEG file in standard base64 with no `data:` prefix. The multipart `part` field of TypeSafe's API is not accepted. ## Example Usage ```typescript theme={null} import { DecisionsImageAsset } from "@openrouter/sdk/models"; let value: DecisionsImageAsset = { dataBase64: "", format: "png", }; ``` ## Fields | Field | Type | Required | Description | | - | - | - | - | | `dataBase64` | *string* | ✔️ | N/A | | `format` | [models.DecisionsImageAssetFormat](../models/decisionsimageassetformat.mdx) | ✔️ | N/A | | `type` | [models.DecisionsImageAssetType](../models/decisionsimageassettype.mdx) | ➖ | N/A |