Task

Note Frequency Lookup

1 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

Note parse x402 REST usage

Parse a note in scientific pitch notation (e.g. "A4", "C#5", "Bb3") into its letter, accidental, pitch class (0..11), octave, MIDI number and frequency in Hz (A4 = 440 Hz).

music.openverbs.com Media & Creative 2 calls / 30d checked 2026-10-26

0.002 USDC per call per call

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