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The Admin API is versioned. Our API versions are named for the date the version is released. For example, our latest version is . Set the version by including a Notion-Version header. Setting this header is required.
cURL
curl https://api.notion.com/admin/v1/legal_holds \
-H "Authorization: Bearer adm_t1CdN9S8yicG5eWLUOfhcWaOscVnFXnsJM9cWeCdTNfhbt"
-H "Notion-Version: 2026-06-01"
Required HeaderThe Notion-Version header must be included in all REST API requests. This ensures the Notion API response is consistent with what your code expects.The most recent Notion-Version is .