> ## 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.

# Upsert Attribute Values

> Create or update values on a product attribute.

Upserts the given values on the attribute — items with an `id` update an existing value, items without one create a new value.

## Path parameters

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

## Body parameters

<ParamField body="values" type="object[]" required>
  Values to create or update — one of two shapes per item.

  <Expandable title="update existing value (by id)">
    <ParamField body="id" type="string" required>The value's ID.</ParamField>
    <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>
  </Expandable>

  <Expandable title="create new value (by name)">
    <ParamField body="name" type="string" required>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>
  </Expandable>
</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 after the upsert, with `id`, `name`, `handle`, `rank`, and `is_active`.</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' \
    -H 'Authorization: Bearer <token>' \
    -H 'Content-Type: application/json' \
    -d '{"values": [{ "name": "Wool" }, { "id": "pattrval_01HXYZABCDEF", "rank": 1 }]}'
  ```

  ```ts JS Client theme={null}
  const { product_attribute } = await client.admin.productAttributes.$id.values.mutate({
    $id: "pattr_01HXYZABCDEF",
    values: [{ name: "Wool" }, { id: "pattrval_01HXYZABCDEF", rank: 1 }],
  })
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "product_attribute": {
      "id": "pattr_01HXYZABCDEF",
      "name": "Material",
      "type": "single_select",
      "values": [
        { "id": "pattrval_01HXYZABCDEG", "name": "Wool", "rank": 0 },
        { "id": "pattrval_01HXYZABCDEF", "name": "Linen", "rank": 1 }
      ]
    }
  }
  ```
</ResponseExample>