> ## Documentation Index
> Fetch the complete documentation index at: https://docs.jiekou.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Midjourney Upscale

Use the Midjourney Upscale feature to upscale generated images, improving image resolution and detail quality. This API uses asynchronous processing, and the client needs to query the final generated result using the task\_id.

## Request Headers

<ParamField header="Content-Type" type="string" required={true}>
  Enum value: `application/json`
</ParamField>

<ParamField header="Authorization" type="string" required={true}>
  Bearer authentication format: Bearer \{\{API Key}}.
</ParamField>

## Request Body

<ParamField body="image_no" type="integer" required={true}>
  Image number, used to specify the image to upscale.

  Value range: 0\~3
</ParamField>

<ParamField body="task_id" type="string" required={true}>
  The unique identifier of the original image generation task.
</ParamField>

<ParamField body="type" type="integer" required={true}>
  Upscale type, which controls the style of the upscaling process.

  Value range: 0\~1

  * `0`: v6/niji6/v6.1/v7 subtle upscale
  * `1`: v6/niji6/v6.1/v7 creative upscale
</ParamField>

## Response Parameters

<ResponseField name="task_id" type="string" required={true}>
  The task\_id of the asynchronous task. You should use this task\_id to request the [Get Task Result API](/en/docs/models/reference-get-async-task-result) to obtain the generated result.
</ResponseField>