{"uid":"cap_iEuAJ_AtwrpQDeJu57BYZ","slug":"blockrun-sound-effects-generator-49226896","name":"BlockRun Sound Effects Generator","description":"AI sound effect generation (ElevenLabs) — pay per call with USDC on Base","url":"https://blockrun.ai/api/v1/audio/sound-effects?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string","description":"Description of the sound effect to generate"},"model":{"type":"string","description":"Sound effect model ID (elevenlabs/sound-effects)"},"response_format":{"type":"string","description":"Audio format: mp3 (default), opus, pcm, wav"},"duration_seconds":{"type":"number","description":"Clip length 0.5-22s (optional)"},"prompt_influence":{"type":"number","description":"0-1 prompt adherence (optional)"}}},"responseSchema":null,"example":{"request":{"text":"A dog barking in the distance with birds chirping","model":"elevenlabs/sound-effects","response_format":"mp3","duration_seconds":5,"prompt_influence":0.8},"response":{"data":[{"url":"https://blockrun.ai/api/media/media/audios/2026/06/12/e5c4d256-171c-44ae-818e-de5eaf7927c1.mp3","format":"mp3"}],"model":"elevenlabs/sound-effects","created":1781241032}},"exampleRequest":{"text":"A dog barking in the distance with birds chirping","model":"elevenlabs/sound-effects","response_format":"mp3","duration_seconds":5,"prompt_influence":0.8},"tags":["x402"],"displayCostAmount":"0.052501","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":7,"rating":{"score":"0.89","successRate":"0.93","reviews":7,"stars":"4.6","state":"rated"},"availabilityStatus":"healthy","priceObserved":{"p10Cents":"5.3501","medianCents":"5.3501","p90Cents":"5.3501","minCents":"5.3501","maxCents":"5.3501","p95Cents":"5.3501","sampleCount":19,"varies":false,"failureChargeRate":null},"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.052501/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.053501","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.053501","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_UZ8i3H9APAhEGfAHWXYUF","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.053501","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates AI-synthesized sound effects from a text description using ElevenLabs, paid per-call in USDC with no API key required","exampleAgentPrompt":"Generate a 3-second sound effect of a thunderstorm with heavy rain and distant thunder rolls, returned as a wav file — use ElevenLabs sound-effects model with prompt influence set to 0.8.","exampleUseCases":null,"resultDescription":"Returns an audio file (mp3 by default, or opus/pcm/wav if specified) containing the AI-generated sound effect matching the text description, at the requested duration.","failureModes":["Invalid duration outside 0.5–22s range returns a 400 error","Unsupported response_format value causes a 422 validation error","Insufficient USDC balance or failed x402 payment results in 402 Payment Required","Vague or unrecognized text description may produce generic or unexpected audio","Model ID not recognized returns a 400 or 404 error"],"whenToPreferThis":"Choose this endpoint when you need to programmatically generate custom sound effects from text descriptions without managing separate API keys or accounts. Ideal for AI agents that want to pay per call in USDC on Base or Solana, especially when building apps needing dynamic audio, game sound effects, or foley sounds on demand.","instructions":null,"reviewSummary":"BlockRun.AI delivers AI-generated sound effects via ElevenLabs, returning downloadable MP3 URLs (44.1kHz) typically within ~4 seconds at around $0.05 per call. Reliability is consistently high across UI sounds, game SFX, and chiptune one-shots, with accurate transients and no leading silence. Accuracy is strong overall but prompt wording matters: timbre descriptors like 'soft' or 'muted' can produce near-silent output, requiring adjusted phrasing or post-processing normalization.","reviewSummaryHighlights":["Highly reliable MP3 URL delivery with fast turnaround (~4s per generation)","Excellent value at ~$0.05 per call, confirmed across batch and single-shot use","Clean transients with no leading silence, usable directly in production"],"reviewSummaryConcerns":["Timbre words like 'soft', 'muted', or 'mellow' can produce near-silent output — describe volume and timbre separately","Returns a JSON URL rather than raw audio bytes, requiring an additional fetch step"],"reviewSummaryGeneratedAt":"2026-10-20T08:15:14.347Z","activationCount":329,"lastUsedAt":"2026-10-24T23:56:40.206Z","lastSuccessfullyRanAt":"2026-10-24T23:56:40.206Z","lastHealthCheckAt":"2026-10-30T15:07:00.115Z","isFirstParty":false,"canonicalSlug":"blockrun-sound-effects-generator-49226896"}