{"uid":"cap_YciEwHZTLcqLC6oXR3ng-","slug":"relaystation-audio-waveform-spectrogram-renderer-01bd5096","name":"Relaystation Audio Waveform & Spectrogram Renderer","description":"$0.0005/call. Render audio as a waveform or spectrogram PNG — visualize any track. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny","url":"https://api.relaystation.ai/v1/media/waveform","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","properties":{"file":{"type":"object","description":"cputools input-source: { inline: <base64 ≤ 4 MiB> } or { inputKey: <scratch key ≤ 50 MB> }. The input container must sniff (ffprobe) to the live allowlist (operator-tunable cputools.media.input_formats): 3g2, 3gp, aac, asf, avi, flac, flv, gif, m4a, m4v, matroska, mj2, mov, mov,mp4,m4a,3gp,3g2,mj2, mp3, mp4, mpeg, mpegts, mpegvideo, ogg, wav, webm, wmv. An off-list input is a free 422 UNSUPPORTED_FORMAT."},"mode":{"enum":["waveform","spectrogram"],"type":"string"},"color":{"enum":["blue","red","green","white","black","cyan","magenta","yellow","orange","gray"],"type":"string"},"width":{"type":"integer","maximum":2000,"minimum":100},"height":{"type":"integer","maximum":1080,"minimum":50}}},"type":{"type":"string","const":"http"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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_fkRIlEbKm7isOOeyZgkst","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Renders an audio file as a waveform or spectrogram PNG image for visual track analysis","exampleAgentPrompt":"Can you render a waveform PNG visualization of this podcast audio file at https://example.com/episode42.mp3?","exampleUseCases":[{"title":"Podcast episode waveform thumbnail","prompt":"Generate a waveform image for my podcast episode at https://cdn.mypodcast.com/ep10.mp3 — I need a PNG I can use as a visual thumbnail on the episode page."},{"title":"Music track spectrogram analysis","prompt":"Create a spectrogram PNG from this audio track at https://storage.myapp.com/track.wav so I can visually inspect its frequency content."},{"title":"Audio player UI waveform display","prompt":"I need a waveform visualization image for the audio clip at https://uploads.mysite.com/clip.mp3 to display in my web audio player's progress bar."}],"resultDescription":"A PNG image file containing either a waveform (amplitude over time) or spectrogram (frequency over time) visualization of the submitted audio. The image can be used directly in UIs, thumbnails, or analysis workflows.","failureModes":["Unsupported audio format returns an error","Invalid or unreachable audio URL causes fetch failure","Audio file too large or too long may time out","Missing required parameters returns a 400 bad request","Insufficient x402 payment balance blocks the call"],"whenToPreferThis":"Choose this endpoint when you need a fast, low-cost server-side audio visualization rendered as a PNG — ideal for pipelines that need waveform or spectrogram images without client-side rendering dependencies. Prefer it over client-side libraries when operating in headless or server environments, or when a consistent visual output format is required at scale.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:48:35.102Z","isFirstParty":false}