{"uid":"cap_r3ducoiTSxvqqzMoiPpIT","slug":"music-theory-chord-namer-99196cdf","name":"Music Theory Chord Namer","description":"Name a chord from its notes (C E G Bb, A C E G): best name, inversion and alternative names; first note is the bass.","url":"https://music-theory.x402tookit.com/chord-name?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"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["notes"],"properties":{"notes":{"type":"string","description":"Notes separated by spaces or commas, lowest first: E G C or A C E G"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"bass":{"type":["null","string"]},"best":{"type":["null","string"]},"root":{"type":["null","string"]},"source":{"type":["null","string"]},"quality":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"inversion":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"alternatives":{"type":["array","null"],"items":{"type":"string"}},"pitchClasses":{"type":["array","null"],"items":{"type":"number"}},"rootPosition":{"type":["boolean","null"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_zwJJg2h5Sen2BhLBS9btW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Identifies the best chord name, inversion, and alternative names from a set of input notes, treating the first note as the bass.","exampleAgentPrompt":"What chord is spelled by the notes C E G Bb — give me the best chord name, what inversion it's in, and any alternative names for it.","exampleUseCases":[{"title":"Identify a jazz chord voicing","prompt":"I'm looking at a chord on the piano with the notes F A C Eb from lowest to highest — what chord is that, what inversion is it in, and are there any alternative names I should know?"},{"title":"Confirm chord name while composing","prompt":"I've got these notes stacked up: B D F A — can you tell me the chord name, whether it's in root position, and any other names it might go by?"},{"title":"Analyze bass-inverted chord in a score","prompt":"There's a chord in this piece where G is in the bass and the other notes are C and E above it — what's the chord name and inversion?"}],"resultDescription":"Returns the best chord name (e.g. 'C7'), the inversion number (0 = root position), root note, chord quality, a human-readable summary, alternative chord names, pitch class integers, a boolean for root position, and optional reasons or disclaimers about the identification.","failureModes":["Invalid or unrecognized note names return an error or null result","Ambiguous note sets with multiple equally valid interpretations may return degraded=true with caveats","Fewer than two notes provided may not yield a meaningful chord name","Non-standard enharmonic spellings may not be recognized","Network or payment authorization failure returns HTTP 402 or 5xx"],"whenToPreferThis":"Use this endpoint when you have a set of note names and need to identify the chord they form, including its inversion and alternative names. Prefer it over chord-spelling endpoints (which go symbol→notes) when your input is notes and your output goal is a chord symbol or name.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T00:30:48.077Z","isFirstParty":false,"canonicalSlug":"music-theory-chord-namer-99196cdf"}