{"id":"a39596b9-4e0d-452c-bc11-99c76dba292b","shortId":"H2Fdzm","kind":"mpp","title":"Replace image backgrounds and relight subjects with AI via pay-per-call MPP endpoint.","tagline":"Replace image backgrounds and relight subjects with AI via pay-per-call MPP endpoint.","description":"This endpoint provides Stability AI's Replace Background & Relight capability through the Locus MPP (Micropayment Protocol) gateway. It accepts a foreground subject image and generates a new background based on a text prompt or reference image, while adjusting lighting on the subject to match the new scene. Parameters include light source direction (left/right/above/below), light intensity, foreground and background prompts, and output format selection.\n\nThe endpoint is part of a broader Stability AI service suite available through Locus MPP that includes image generation (Ultra, Core, SD3), editing (erase, inpaint, outpaint, search-and-replace, search-and-recolor), upscaling, style transfer, 3D model generation, and audio generation. This specific endpoint costs $0.092 per call (92,000 base units of pathUSD with 6 decimals), settled via the Tempo method on-chain.\n\nThe endpoint accepts POST requests with a JSON body. Only `subject_image` is required; all other parameters (background_prompt, background_reference, foreground_prompt, light_source_direction, light_source_strength, output_format, seed) are optional. The OpenAPI spec is well-documented. Note that the probe returned 404 on HEAD/GET methods, which is expected since this is a POST-only endpoint.","tags":["image-generation","stable-diffusion","upscaling","3d"],"capabilities":["background-replacement","image-relighting","text-guided-background","reference-image-background","light-direction-control","image-editing","pay-per-call","crypto-settlement"],"categories":["vision","ai","media"],"synonyms":["background swap","image relighting","scene replacement","background generation","composite lighting","photo background change","stability ai background","image compositing"],"warnings":["Probe did not capture a 402 challenge on this endpoint (HEAD/GET returned 404); endpoint is POST-only so liveness could not be confirmed via the probe methods used","No response schema documented — output format/structure is unknown","Currency address 0x20c000000000000000000000b9537d11c60e8b50 assumed to be pathUSD (6 decimals) based on context but not independently verified"],"endpointUrl":"https://stability-ai.mpp.paywithlocus.com/stability-ai/replace-background-and-relight","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":"0.620","qualityRationale":"Full OpenAPI schema with clear parameter documentation and pricing is available. However, the endpoint probe returned 404 on HEAD/GET (expected for POST-only), no actual 402 challenge was captured for this specific path, no response schema or example response is documented, and crawled pages returned no useful content beyond error 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