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Access Controls for App Metafields
API
Effective January 01, 2023
As of the 2023-01 Admin API release, you can optionally specify an access setting when you create or update metafield definitions via the API. This new setting will allow you to control who else can access the metafields under your definition via the Admin API.
Note that this setting can only be set when the definition is in your own reserved namespace.
Possible settings you can use are PRIVATE (no one else can access the metafields), MERCHANT_READ (the merchant has read-only access to the metafields via the admin UI), and MERCHANT_READ_WRITE (the merchant can view and edit the metafields via the admin UI).
Learn more about reserved namespaces.
Learn more about access controls.