How I Migrated 7,000 Tracks from Yandex Music to Spotify: A Technical Breakdown

The author shares their experience migrating a music library from Yandex Music to Spotify, overcoming the lack of a public API for the former and strict quota limitations for the latter. Since existing third-party tools failed, the developer built a custom solution. The article details the implementation process: managing progress logs with fsync, handling HTTP 429 errors without external libraries, and implementing a track-matching algorithm based on duration to avoid search inaccuracies. The author also analyzes critical bugs that caused data loss and offers solutions. This article serves as a practical guide for those dealing with automation against closed or restricted APIs, emphasizing the importance of robust error handling and data integrity when migrating large datasets.