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Saylor Innovations Chord Chart Transposer
x402
Saylor Innovations Chord Chart Transposer is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).
Transposes a set of guitar/keyboard chords to a new key, returning correctly spelled chords, a mapping table, capo shapes, and key signature information
Price / call$0.01
Success—
StatusUnknown
How this service works
Transposed chords with correct spelling, mapping table, capo shapes and key signature
Output
A JSON object containing the transposed chord names with correct enharmonic spelling, a mapping table pairing each original chord to its transposed equivalent, capo shape suggestions for guitar, and key signature information for the target key.
Example use cases
Vocalist key change for live performance
“Our singer needs the song in the key of Bb instead of D — can you transpose these chords D A Bm G to Bb and show us the chord mapping and capo options?”
Semitone shift for easier fingering
“These chords F Bb Cm Gm are tough to play — shift them up 2 semitones and show me the new chord names with correct spelling, preferring sharps.”
Band arrangement in matched key
“Transpose the chord progression Em7 A7 Dmaj7 G from E minor to C minor and give me the full mapping table and key signature details.”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/music/transpose?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need programmatic chord transposition with music-theory-correct spelling, capo suggestions, and a full mapping table — particularly useful for musicians, songwriting tools, and music education apps. It handles complex chord names like Em7, A7, Dmaj7 and supports flexible input delimiters, making it more robust than generic string-replacement approaches.
Side effects
- Invalid or unrecognized chord names in the input return an error
- More than 64 chords in the input exceeds the limit and is rejected
- Conflicting parameters (e.g. both semitones and to_key specified ambiguously) may return unexpected results
- Unsupported key names or accidental preferences may cause a 400-level error
- Network or payment (x402) failures result in no response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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