{"uid":"cap_887ogNfc1sDBfvRKBeToB","slug":"music-openverbs-com-transpose-note-679a0c1f","name":"music.openverbs.com Transpose Note","description":"Transpose a note by a (possibly negative) number of semitones. Result is spelled chromatically with sharps, or flats when `preferFlats` is true.","url":"https://music.openverbs.com/v1/transpose","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["note","semitones"],"properties":{"note":{"type":"string","maxLength":8,"minLength":1,"description":"Note to transpose."},"semitones":{"type":"integer","maximum":127,"minimum":-127,"description":"Semitones to move (negative = down)."},"preferFlats":{"type":"boolean","description":"Spell the result with flats. Default false (sharps)."}},"additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_rnNSyM4A7rd27RoLE5eVQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Transposes a musical note up or down by a specified number of semitones, returning the result spelled with sharps or flats.","exampleAgentPrompt":"What note is 7 semitones above F#? Spell the result with sharps.","exampleUseCases":[{"title":"Transposing a melody for a different key","prompt":"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?"},{"title":"Spelling enharmonic equivalents with flats","prompt":"What note is 3 semitones below Bb, spelled using flats instead of sharps?"},{"title":"Calculating interval targets for composition","prompt":"I'm composing a chord progression and need to know what note is 7 semitones above G — give me the answer spelled with sharps."}],"resultDescription":"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').","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:31:38.431Z","isFirstParty":false}