FreqBlog Launches MCP-Powered Harmonic DJ Set-Builder After Spotify API Cuts

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After Spotify deprecated its Audio Features, Recommendations, and Related Artists endpoints for new apps in November 2024, FreqBlog built replacement APIs that restore this functionality. Beyond simple parity, the platform introduced a set-builder tool that Spotify never offered, featuring pairwise transition scoring, next-track ranking, and full setlist ordering based on the Camelot harmonic mixing wheel. Each track lookup returns over 40 fields including BPM, key, energy, and genre in a flat data structure, with BPM and key guaranteed non-null. The entire system is exposed via a Model Context Protocol (MCP) server, allowing AI agents and large language models to plan DJ sets by calling music-theory tools directly without custom integration code. The platform targets developers working on music applications or AI tooling who previously relied on Spotify's now-removed endpoints.

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