{"id":"a91f111c-6a13-42db-8649-02840a3fa4b2","shortId":"AVCW3T","kind":"mpp","title":"Fast image upscaling via Stability AI, pay-per-call over MPP/Tempo.","tagline":"Fast image upscaling via Stability AI, pay-per-call over MPP/Tempo.","description":"This endpoint provides access to Stability AI's Upscale Fast model through the Locus MPP (Micropayment Protocol) gateway. It accepts a source image and returns an upscaled version with improved resolution. The endpoint uses a simple per-call charge model settled via Tempo L2 in pathUSD.\n\nUpscale Fast is the lightest upscaling option in the Stability AI suite available through this gateway, priced at $0.023 per call (23,000 base units of a 6-decimal stablecoin). It requires only an image as input and optionally accepts an output_format parameter (jpeg, png, or webp). The endpoint is part of a broader Stability AI service catalog on Locus MPP that includes image generation (Ultra, Core, SD3), editing (erase, inpaint, outpaint, search-and-replace, search-and-recolor), background removal and replacement, style transfer, sketch-to-image, 3D model generation, and audio generation/editing.\n\nThe 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. The OpenAPI schema is well-documented with clear request body definitions. Payment intent is \"charge\" (one-shot per call) using the Tempo settlement method. Note that no response schema is documented beyond a generic \"200: Successful response,\" so the exact output format (base64 image, URL, etc.) must be inferred from Stability AI's upstream API documentation.","tags":["image-generation","stable-diffusion","upscaling","3d"],"capabilities":["image-upscaling","fast-upscale","pay-per-call","mpp-tempo-settlement","jpeg-output","png-output","webp-output"],"categories":["vision","media"],"synonyms":["image upscale","super resolution","image enlargement","stability ai upscale","increase image resolution","upscale image api","image enhancement","sr model"],"warnings":["Probe did not attempt POST; HEAD/GET returned 404, which is expected for a POST-only endpoint but means liveness is unconfirmed","No response schema documented — output format (base64, URL, binary) is unknown from this spec alone","Currency address 0x20c000000000000000000000b9537d11c60e8b50 assumed to be a 6-decimal stablecoin (pathUSD); if decimals differ, the $0.023 price estimate would be wrong"],"endpointUrl":"https://stability-ai.mpp.paywithlocus.com/stability-ai/upscale-fast","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":"0.550","qualityRationale":"The OpenAPI spec is detailed with clear request schemas and pricing for this endpoint. However, the probe did not capture a live 402 challenge (POST was not attempted; HEAD/GET returned 404 as expected for a POST-only route), no response schema is documented, and crawled pages returned only generic 404 JSON. The endpoint is likely live but liveness is not confirmed by the 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