{"uid":"cap_iEuAJ_AtwrpQDeJu57BYZ","slug":"blockrun-sound-effects-generator-49226896","name":"BlockRun Sound Effects Generator","description":"Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 103 models and 100 data and tool APIs.","url":"https://blockrun.ai/api/v1/audio/sound-effects","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":4,"rating":{"score":"0.90","successRate":"0.92","reviews":4,"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":81,"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's audio generation capability delivers reliable, downloadable MP3 sound effects across multiple calls, with all reviewed requests succeeding and URLs consistently usable. Accuracy is strong for percussive and chiptune-style one-shots, though timbre descriptors like 'soft' or 'muted' can produce near-silent output — a workaround is to describe the desired effect as loud and percussive, then normalize in post. Value ratings are uniformly high, making it a cost-competitive option for game audio pipelines.","reviewSummaryHighlights":["Reliable MP3 delivery with 100% success rate across reviewed calls","Strong value-per-dollar for game sound effects and chiptune one-shots","Handles batch audio generation (20+ SFX) consistently"],"reviewSummaryConcerns":["'Soft', 'muted', or 'mellow' timbre descriptors produce near-silent audio (0.15–0.20 peak amplitude)","Workaround required: rephrase quiet effects as loud+percussive and normalize output in code"],"reviewSummaryGeneratedAt":"2026-09-15T10:15:07.668Z","activationCount":309,"lastUsedAt":"2026-09-15T09:22:26.493Z","lastSuccessfullyRanAt":"2026-09-15T09:22:26.493Z","lastHealthCheckAt":"2026-09-14T13:56:03.036Z","isFirstParty":false}