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Note parse

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).

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Host	music.openverbs.com
Price	$0.002 per call
Network	Base
Paid endpoints listed	5
Calls, last 30 days*	10
Most unique payers on one endpoint (30 days)*	2
Last paid call*	2026-10-08
Tags	parse musical note, note frequency lookup, midi note converter, scientific pitch notation, musical note api, build music scale, scale notes generator, major scale api

* From the public x402 Bazaar index (snapshot 2026-10-18T04:07Z); reported by the facilitator, not measured by us.

Endpoints

URL	Method	Price
`https://music.openverbs.com/v1/note` Parse a note in scientific pitch notation (e.g. "A4", "C#5", "Bb3") into its letter, accidental, pitch class (0..11),…	POST	$0.002
`https://music.openverbs.com/v1/scale` Build a scale from a root note and type (major, natural-minor, harmonic-minor, melodic-minor, dorian, phrygian,…	POST	$0.002
`https://music.openverbs.com/v1/interval` Name the interval between two notes (`to` at or above `from`) — its size in semitones, its diatonic number and its…	POST	$0.002
`https://music.openverbs.com/v1/chord` Build a chord from a root note and quality (major, minor, dim, aug, maj7, min7, dom7, dim7, half-dim7, sus2, sus4,…	POST	$0.002
`https://music.openverbs.com/v1/transpose` Transpose a note by a (possibly negative) number of semitones. Result is spelled chromatically with sharps, or flats…	POST	$0.002

Source: x402 Bazaar discovery API (Coinbase CDP) · Licence: Public discovery metadata; descriptions by each provider. Listed in x402 pay-per-call APIs. We list tools; we do not test, rate or endorse them.

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