From the source
Vercel added MongoDB Atlas to its Marketplace, allowing developers to provision a managed MongoDB database directly from the Vercel dashboard with automatic environment variable configuration and integrated billing.
MongoDB Atlas is now available on the Vercel Marketplace
MongoDB Atlas integration on Vercel Marketplace
Availability change
From the source
Developers can now provision a fully managed MongoDB database directly from your Vercel dashboard and connect it to your project without leaving the platform.
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