Update Product Custom Field
Updates a *Custom Field*.
**Required Fields**
- none
**Name-Value Pair Uniqueness**
- Every name-value pair must be unique inside a product.
**Read-Only**
- id
**Limits**
- 200 custom fields per product limit.
- 250 characters per custom field limit.
Authentication
X-Auth-Tokenstring
### OAuth scopes
| UI Name | Permission | Parameter |
|:--------|:-----------|:----------|
| Products | modify | `store_v2_products` |
| Products | read-only | `store_v2_products_read_only` |
### Authentication header
| Header | Argument | Description |
|:-------|:---------|:------------|
| `X-Auth-Token` | `access_token` | For more about API accounts that generate `access_token`s, see our [Guide to API Accounts](/developer/docs/overview/api-accounts#api-accounts). |
### Further reading
For example requests and more information about authenticating BigCommerce APIs, see [Authentication and Example Requests](/developer/docs/overview/api-accounts#x-auth-token-header-example-requests).
For more about BigCommerce OAuth scopes, see our [Guide to API Accounts](/developer/docs/overview/api-accounts#oauth-scopes).
For a list of API status codes, see [API Status Codes](/developer/api-reference/rest/overview#rest-http-status-codes).
Path parameters
product_id
custom_field_id
Request
This endpoint expects an object.
name
The value of the field, shown on the storefront, orders, etc. This field is a requirement for /POST requests.
value
The value of the field, shown on the storefront, orders, etc. This field is a requirement for /POST requests.
Response
Gets Custom field.
data
Gets custom fields associated with a product. These allow you to specify additional information that will appear on the product’s page, such as a book’s ISBN or a DVD’s release date.
meta
Response metadata.
Errors
403
Forbidden Error
404
Not Found Error
405
Method Not Allowed Error
422
Unprocessable Entity Error
