{"uid":"cap_m_-im1iyTeoSszL48CcFM","slug":"saylor-innovations-chord-chart-transposer-eabfeaf3","name":"Saylor Innovations Chord Chart Transposer","description":"Transposed chords with correct spelling, mapping table, capo shapes and key signature","url":"https://saylorinnovations.com/api/music/transpose?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","POST","PUT","PATCH","DELETE","HEAD"],"type":"string"},"queryParams":{"type":"object","required":["chords"],"properties":{"chords":{"type":"string","description":"required chords separated by spaces, commas, dashes or | for example C G Am F or Em7|A7|Dmaj7 (max 64) (query)"},"prefer":{"type":"string","description":"optional sharps, flats or auto (default) (query)"},"to_key":{"type":"string","description":"optional target key (query)"},"from_key":{"type":"string","description":"optional original key (with to_key) (query)"},"semitones":{"type":"string","description":"optional shift in semitones, positive up (query)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object"},"description":{"type":"string"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wPq2m6NebhKDKi6MsZJEH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Transposes a set of guitar/keyboard chords to a new key, returning correctly spelled chords, a mapping table, capo shapes, and key signature information","exampleAgentPrompt":"Can you transpose the chords C G Am F to the key of E, using sharps where possible, and show me the capo shapes and chord mapping table?","exampleUseCases":[{"title":"Vocalist key change for live performance","prompt":"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?"},{"title":"Semitone shift for easier fingering","prompt":"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."},{"title":"Band arrangement in matched key","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:42:08.458Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-chord-chart-transposer-eabfeaf3"}