James B. Pollack Music - Harmonic Mix Plan Generator

Use this endpoint when you need to algorithmically sequence a specific set of tracks into a harmonically smooth DJ mix order based on Camelot wheel compatibility. Ideal for DJ set planning, playlist sequencing, or any workflow where minimizing key clashes between adjacent tracks is important. Complements the catalog search endpoint on the same service.

• Fewer than 2 or more than 30 tracks provided — returns validation error
• Invalid track paths that don't exist in the catalog — returns not found error
• BPM tolerance value out of acceptable range — returns validation error
• Network or payment failure via x402 protocol — returns 402 Payment Required