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

# Update Attribute Value

> Update a single value on a product attribute.

Updates the value and returns the parent attribute.

## Path parameters

<ParamField path="id" type="string" required>The attribute's ID.</ParamField>
<ParamField path="value_id" type="string" required>The value's ID.</ParamField>

## Body parameters

<ParamField body="name" type="string">Value name.</ParamField>
<ParamField body="handle" type="string">Unique URL-safe handle.</ParamField>
<ParamField body="rank" type="number">Sort rank; must be non-negative.</ParamField>
<ParamField body="is_active" type="boolean">Whether the value is active.</ParamField>
<ParamField body="metadata" type="object">Custom key-value data.</ParamField>
<ParamField body="additional_data" type="object">Custom data passed to workflow hooks.</ParamField>

## Response

<ResponseField name="product_attribute" type="object">
  <Expandable title="properties">
    <ResponseField name="id" type="string">The attribute's ID.</ResponseField>
    <ResponseField name="name" type="string">Attribute name.</ResponseField>
    <ResponseField name="type" type="string">The attribute's type.</ResponseField>
    <ResponseField name="values" type="object[]">All values, including the updated one.</ResponseField>
    <ResponseField name="updated_at" type="string">Last update timestamp.</ResponseField>
  </Expandable>
</ResponseField>

<RequestExample>
  ```bash cURL theme={null}
  curl -X POST 'http://localhost:9000/admin/product-attributes/pattr_01HXYZABCDEF/values/pattrval_01HXYZABCDEF' \
    -H 'Authorization: Bearer <token>' \
    -H 'Content-Type: application/json' \
    -d '{"name": "Belgian Linen"}'
  ```

  ```ts JS Client theme={null}
  const { product_attribute } =
    await client.admin.productAttributes.$id.values.$value_id.mutate({
      $id: "pattr_01HXYZABCDEF",
      $value_id: "pattrval_01HXYZABCDEF",
      name: "Belgian Linen",
    })
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "product_attribute": {
      "id": "pattr_01HXYZABCDEF",
      "name": "Material",
      "type": "single_select",
      "values": [
        { "id": "pattrval_01HXYZABCDEF", "name": "Belgian Linen", "rank": 0 }
      ]
    }
  }
  ```
</ResponseExample>