# Adding unique values to metafields — Shopify developer changelog
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## Adding unique values to metafields

As of `2025-01` Admin API, you can now make metafield definitions that enforce uniqueness.

The new `uniqueValues` capability ensures that each metafield has a unique value across all resources. This is available for `single_line_text_field`, `number_integer`, `url`, and [`id`](https://shopify.dev/changelog/using-custom-ids-and-handles-in-product-and-customer-lookups). For now, this capability can only be set on metafield definitions that don’t yet have associated metafields.

*Published: December 11, 2024*
Tags: API, New
Link: https://shopify.dev/changelog/adding-unique-values-to-metafields

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