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music.openverbs.com Transpose Note
x402
music.openverbs.com Transpose Note is a paid API for AI agents from music.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Transposes a musical note up or down by a specified number of semitones, returning the result spelled with sharps or flats.
Price / call$0.002
Success—
StatusUnknown
How this service works
Transpose a note by a (possibly negative) number of semitones. Result is spelled chromatically with sharps, or flats when `preferFlats` is true.
Output
Returns the transposed note name as a string, spelled chromatically using sharps by default (e.g. 'C#', 'F#') or flats when preferFlats is true (e.g. 'Db', 'Gb').
Example use cases
Transposing a melody for a different key
“I'm writing a melody starting on C and want to move every note up 4 semitones. What does D become when transposed up 4 semitones?”
Spelling enharmonic equivalents with flats
“What note is 3 semitones below Bb, spelled using flats instead of sharps?”
Calculating interval targets for composition
“I'm composing a chord progression and need to know what note is 7 semitones above G — give me the answer spelled with sharps.”
Technical details
Endpoint
POSThttps://music.openverbs.com/v1/transposeWhen to prefer
Use this endpoint when you need to computationally shift a single note by an exact number of semitones and get the resulting note name back — especially when you need control over accidental spelling (sharps vs flats). Prefer this over manual calculation or a full scale/chord builder when the task is purely a single-note transposition.
Side effects
- Note string is empty or missing — validation error
- Semitones value outside -127 to 127 range — validation error
- Note string is not a recognized note name — parse error
- preferFlats is not a boolean — type error
- Missing required fields (note or semitones) — 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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