{"provider":{"host":"music.openverbs.com","name":"Transpose a note","score":69.9,"live":true,"checkedAt":"2026-10-27T19:39:11.512Z","uptime72h":100,"lastCheck":{"httpStatus":402,"ms":579,"note":"valid x402 v2 terms"},"endpoints":5,"networks":["eip155:8453"],"cheapestUsd":"0.002","income7dUsd":"21.821","payers7d":28,"transfers7d":1470,"payoutAddressShared":true,"claimed":false,"page":"https://logicnodes.io/observatory/p/music.openverbs.com"},"endpoints":[{"url":"https://music.openverbs.com/v1/chord","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Build a chord from a root note and quality (major, minor, dim, aug, maj7, min7, dom7, dim7, half-dim7, sus2, sus4, maj6, min6). Notes are spelled by stacked thirds (C dom7 → C E G Bb). Returns the note names, MIDI numbers and semitone intervals."},{"url":"https://music.openverbs.com/v1/interval","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Name the interval between two notes (`to` at or above `from`) — its size in semitones, its diatonic number and its quality (perfect/major/minor/augmented/diminished). Correct spelling matters: C→F# is an augmented fourth, C→Gb a diminished fifth."},{"url":"https://music.openverbs.com/v1/note","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"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)."},{"url":"https://music.openverbs.com/v1/scale","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Build a scale from a root note and type (major, natural-minor, harmonic-minor, melodic-minor, dorian, phrygian, lydian, mixolydian, locrian, major-pentatonic, minor-pentatonic, blues, chromatic). Heptatonic scales and modes are spelled diatonically (F major → F G A Bb C D E). Returns the note names, MIDI numbers and semitone intervals."},{"url":"https://music.openverbs.com/v1/transpose","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Transpose a note by a (possibly negative) number of semitones. Result is spelled chromatically with sharps, or flats when `preferFlats` is true."}]}