{"id":"bea9474b-3b4f-4a64-ab5f-8daf25a2866a","shortId":"DNtBU3","kind":"mpp","title":"Replace or regenerate sections of audio using Stability AI's audio inpainting via MPP micropayments.","tagline":"Replace or regenerate sections of audio using Stability AI's audio inpainting via MPP micropayments.","description":"The Audio Inpaint endpoint on Stability AI's Locus MPP gateway lets you selectively replace a time-range within an existing audio file using a text prompt. You supply an input audio file, specify the masked region (start and end in seconds), and describe what the replacement content should sound like. The endpoint uses Stability AI's Stable Audio models (stable-audio-2 or stable-audio-2.5) to regenerate just that segment while preserving the surrounding audio. Output formats include MP3 and WAV.\n\nPayment is handled via the MPP (Micropayment Protocol) with Tempo settlement on pathUSD. The listed price is approximately $0.23 per call (at 50 inference steps with stable-audio-2), though the exact amount may vary by model and step count. The endpoint is a POST-only route; the probe returned 404 on HEAD/GET, which is expected since the OpenAPI spec defines only a POST method. Required parameters are `audio` (the input audio file) and `prompt` (a description of the replacement content). Optional parameters include `mask_start`, `mask_end`, `model`, `steps`, and `output_format`.\n\nThis endpoint is part of a broader Stability AI service suite available through the Locus MPP gateway, which also includes image generation (Ultra, Core, SD3), image editing (inpaint, outpaint, erase, search-and-replace), upscaling, 3D model generation, and other audio endpoints (text-to-audio, audio-to-audio). API reference documentation is available at platform.stability.ai, and LLM-specific docs are at beta.paywithlocus.com/mpp/stability-ai.md.","tags":["image-generation","stable-diffusion","upscaling","3d"],"capabilities":["audio-inpainting","text-guided-audio-editing","stable-audio-2","stable-audio-2-5","mpp-tempo-settlement","post-only","mp3-output","wav-output","configurable-inference-steps","mask-region-selection"],"categories":["audio","ai"],"synonyms":["audio inpainting","audio segment replacement","audio editing API","stable audio inpaint","sound inpainting","audio fill","audio mask replace","stability audio edit","audio region regeneration"],"warnings":["Probe returned 404 on HEAD and GET — endpoint is POST-only; liveness not confirmed via 402 challenge","Price amount is null in x-payment-info; the $0.23 figure comes from a description field and may vary by model/steps","No response schema documented — output format and structure must be inferred","No example response available in the spec or crawl data"],"endpointUrl":"https://stability-ai.mpp.paywithlocus.com/stability-ai/audio-inpaint","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"stability-ai.mpp.paywithlocus.com","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.600","qualityRationale":"The OpenAPI spec provides a clear schema with parameter descriptions and pricing info. However, the probe did not capture a live 402 challenge (the endpoint is POST-only and was probed with HEAD/GET), no response schema or example response is documented, and crawled pages returned only 404 error JSON. Pricing is described textually rather than as a fixed base-unit 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