{"uid":"cap_r-W5ogy68y2YvgrWCprnN","slug":"relaystation-media-speed-changer-43ace808","name":"RelayStation Media Speed Changer","description":"$0.0005/MB. Speed up or slow down audio/video — pitch-preserving by default. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny","url":"https://api.relaystation.ai/v1/media/speed","method":"POST","headers":{},"bodySchema":{"type":"object","$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":{"ext":{"type":"string","pattern":"^[a-z0-9]{1,12}$"},"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."},"factor":{"type":"number","maximum":4,"minimum":0.25},"pitchCorrect":{"type":"boolean"}}},"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_fLpcQtnoXGHXkSExmOidF","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":"Changes the playback speed of audio or video files with pitch preservation by default, billed per megabyte of input.","exampleAgentPrompt":"Can you speed up this audio file to 1.5x without changing the pitch? It's about 8MB and I want the faster version back.","exampleUseCases":[{"title":"Speed up podcast for faster listening","prompt":"I have a 45-minute podcast episode that's about 60MB — can you speed it up to 1.75x while keeping the voices sounding natural and pitch-preserved?"},{"title":"Slow down video for frame-by-frame review","prompt":"Slow down this 20MB video clip to 0.5x speed so I can review the motion more carefully, and keep the audio pitch intact."},{"title":"Speed up lecture recording for study","prompt":"I recorded a 2-hour lecture and it's 200MB — can you speed it up to 2x speed with pitch preservation so it sounds like a real voice, not chipmunks?"}],"resultDescription":"Returns the speed-adjusted audio or video file with pitch preserved by default. The output is the transformed media bytes, billed at $0.0005 per MB of input with a minimum charge of 1 cent; any remainder beyond the minimum is automatically credited back.","failureModes":["Unsupported media format — endpoint may reject non-audio/video file types","File too large or malformed — may return an error if bytes are corrupt or unreadable","Invalid speed multiplier — extreme values (e.g. 0x or extremely high multipliers) may be rejected","Insufficient payment — x402 payment below the 1¢ minimum will fail authorization","Network timeout for large files — very large uploads may time out before processing completes"],"whenToPreferThis":"Choose this endpoint when you need programmatic, per-call pitch-preserving speed adjustment of audio or video at low per-MB cost with microtransaction billing. Ideal for agents automating media workflows, content pipelines, or accessibility tooling where tempo changes are needed without voice distortion. Prefer it over FFmpeg-based self-hosted solutions when you want a managed, pay-as-you-go API with no infrastructure overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T09:17:11.373Z","isFirstParty":false}