Mixcard

Mixcard is a niche, charming product: it takes a Spotify playlist and turns it into a printed vintage-style postcard, with a scannable QR code on the back that opens the playlist on Spotify. The postcard is then physically mailed — turning a playlist (the modern equivalent of a mixtape) into a tactile gift you can actually send to someone.

The app is built by Alfred Megally and is documented in Appwrite's "Examples of vibe coding" roundup as one of the showcase products built with Cursor as the primary AI coding tool. The frontend is a Next.js app, with Sentry wired in for error monitoring (visible in the rendered HTML via data-sentry-* attributes throughout the layout). Spotify integration powers the playlist parsing and QR linking, and a print/mail backend handles the physical fulfillment.

What makes Mixcard a good case study for vibe-coded apps is its scope: it is small enough that a single founder can ship it end-to-end with AI assistance, but it spans a non-trivial integration surface (Spotify OAuth, QR generation, image composition for the postcard, payment, print-on-demand and mailing logistics). That blend — narrow product, surprisingly broad plumbing — is exactly the kind of project where a tool like Cursor pays for itself by handling the boilerplate around each integration.

The aesthetic is deliberately analog and nostalgic: the postcards lean into vintage typography and worn-paper textures, contrasting with the very digital input of a streaming playlist.