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

# Update Product

> Update attributes on an existing product

Partially update a product's attributes. Only the fields provided in `attributes` are updated; existing fields are preserved.

<ParamField path="id" type="string" required>
  The unique product ID (UUID).
</ParamField>

<ParamField body="attributes" type="object" required>
  Key-value pairs to update. Provide only the fields you want to change.
</ParamField>

<ParamField body="expected_updated_at" type="string">
  Optimistic concurrency control. If provided, the update fails with a 409 if the product has been modified since this timestamp.
</ParamField>

<ResponseField name="id" type="string">Unique product ID.</ResponseField>
<ResponseField name="attributes" type="object">The full attributes after the update.</ResponseField>
<ResponseField name="status" type="string">Product status.</ResponseField>
<ResponseField name="updated_at" type="string">ISO 8601 timestamp of this update.</ResponseField>

<Warning>
  Setting `expected_updated_at` enables stale-write detection. If the product was modified after the provided timestamp, a `409 Conflict` is returned with `code: "stale_write"`.
</Warning>

<RequestExample>
  ```typescript TypeScript theme={null}
  const updated = await lasso.catalog.update('a1b2c3d4-...', {
    attributes: { price: 34.99, status: 'active' },
  });
  ```

  ```python Python theme={null}
  updated = client.catalog.update(
      "a1b2c3d4-...",
      attributes={"price": 34.99, "status": "active"},
  )
  ```

  ```bash cURL theme={null}
  curl -X PATCH "https://hub.banditshq.com/api/v1/catalog/a1b2c3d4-..." \
    -H "Authorization: Bearer lasso_..." \
    -H "Content-Type: application/json" \
    -d '{"attributes": {"price": 34.99, "status": "active"}}'
  ```
</RequestExample>

<ResponseExample>
  ```json theme={null}
  {
    "id": "a1b2c3d4-...",
    "schema_id": "e5f6a7b8-...",
    "source": "manual",
    "status": "active",
    "attributes": {
      "title": "Premium Widget",
      "sku": "WDG-001",
      "price": 34.99
    },
    "created_at": "2026-05-01T12:00:00Z",
    "updated_at": "2026-05-27T10:15:00Z"
  }
  ```
</ResponseExample>