AI-powered creative image upscaling via Stability AI, pay-per-call over MPP/Tempo
What it does
The Upscale Creative endpoint is part of the Stability AI suite exposed through the Locus MPP (Micropayment Protocol) gateway. It takes a source image and a text prompt describing the image content, then uses Stability AI's creative upscaling model to enlarge the image while adding AI-generated detail. Parameters include creativity level (0–1, default 0.3), negative prompt, style preset, output format (jpeg/png/webp), and a reproducibility seed. Payment is per-call at 690,000 base units of pathUSD on Tempo L2, which equals $0.69 per request.
This endpoint is one of over 20 Stability AI capabilities available on the same MPP gateway, including text-to-image generation (Ultra, Core, SD3), image editing (erase, inpaint, outpaint, search-and-replace, search-and-recolor), background removal and replacement with relighting, style transfer, sketch-to-image, structure-guided generation, 3D model generation (Stable Fast 3D, Stable Point Aware 3D), and audio generation/editing. Each endpoint has independent per-call pricing settled via the Tempo method.
The endpoint accepts POST requests with a JSON body. Required fields are `image` (the source image) and `prompt` (a description of the image content to guide upscaling). The probe returned 404 on HEAD/GET, which is expected since this is a POST-only endpoint. The OpenAPI spec is fully documented with request schemas and payment metadata for all sibling endpoints.
Capabilities
Use cases
- —Upscale low-resolution product photos with AI-generated detail for e-commerce listings
- —Enhance AI-generated images to higher resolution while adding creative detail
- —Enlarge artwork or illustrations with style-consistent detail synthesis
- —Prepare low-res assets for print by creatively upscaling with prompt guidance
- —Batch-upscale user-uploaded images in a SaaS pipeline with per-call billing
Fit
Best for
- —Agents or pipelines needing high-quality creative image upscaling on demand
- —Developers who want pay-per-call access to Stability AI without managing API keys directly
- —Workflows requiring prompt-guided upscaling where AI adds meaningful detail beyond simple interpolation
- —Applications that need multiple output formats (jpeg, png, webp) from a single endpoint
Not for
- —Simple nearest-neighbor or bicubic upscaling where no AI detail generation is needed
- —High-volume batch processing where per-call pricing at $0.69 may be cost-prohibitive
- —Use cases requiring deterministic pixel-perfect upscaling without any AI hallucination
Quick start
curl -X POST https://stability-ai.mpp.paywithlocus.com/stability-ai/upscale-creative \
-H "Content-Type: application/json" \
-H "Authorization: Bearer <MPP_TOKEN>" \
-d '{
"image": "<base64-encoded-image>",
"prompt": "A detailed photograph of a mountain landscape",
"creativity": 0.3,
"output_format": "png"
}'Example
Request
{
"seed": 42,
"image": "<base64-encoded-image>",
"prompt": "A detailed photograph of a mountain landscape at sunset",
"creativity": 0.3,
"style_preset": "photographic",
"output_format": "png",
"negative_prompt": "blurry, artifacts, noise"
}Endpoint
Quality
Full OpenAPI schema with detailed request parameters and payment info is available. However, the probe did not capture a live 402 challenge (endpoint is POST-only, probe used HEAD/GET), no response schema or example response is documented, and crawled pages returned only 404 JSON errors. Pricing is clear from the spec. No actual response examples exist in the material.
Warnings
- —Probe returned 404 on HEAD and GET — endpoint is POST-only; liveness not confirmed via 402 challenge
- —No response schema documented in OpenAPI spec — output format/structure is unknown
- —Currency address 0x20c000000000000000000000b9537d11c60e8b50 assumed to be pathUSD with 6 decimals based on sibling endpoint descriptions; not independently verified
- —All crawled documentation pages returned 404; external docs at platform.stability.ai/docs/api-reference and beta.paywithlocus.com/mpp/stability-ai.md were not crawled
Citations
- —Upscale Creative costs 690,000 base units (pathUSD on Tempo), equaling $0.69 per callhttps://stability-ai.mpp.paywithlocus.com
- —Required fields are image and prompt; optional fields include creativity (default 0.3), negative_prompt, style_preset, output_format, and seedhttps://stability-ai.mpp.paywithlocus.com
- —The endpoint is part of a suite including generation, editing, 3D, and audio endpoints documented in the OpenAPI spechttps://stability-ai.mpp.paywithlocus.com
- —API reference available at platform.stability.ai/docs/api-reference and LLM docs at beta.paywithlocus.com/mpp/stability-ai.mdhttps://stability-ai.mpp.paywithlocus.com