BPM Finder is an audio intelligence API. Send it an audio file or URL; get back tempo, key signature, energy, danceability, and spectral fingerprint in seconds. Built for DJ apps, mood-based playlists, video editors that auto-cut to the beat, and any product that needs to actually understand audio instead of relying on metadata that does not exist.
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Most audio analysis on the web depends on user-supplied tags or licensed metadata libraries that are expensive, incomplete, and wrong for anything outside the top 40. Independent music platforms, creator tools, and DJ apps need a way to compute these features themselves, but DSP code is hard, and shipping a Python audio pipeline behind a Next.js app is even harder.
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A managed audio analysis API that runs the Python DSP heavy lifting on the backend and returns clean JSON. BPM, key, energy, danceability, loudness, spectral centroid, all from a single endpoint. Stripe-metered billing means apps pay only for the audio they actually analyze.
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Tell us what you are running. We will tell you exactly how we would approach it, within 48 hours, no pitch.
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