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Stability AI Sketch
image-generationstable-diffusionupscaling3daimedia
Stability AI Sketch is a paid API for AI agents from Stability AI at stability-ai.mpp.paywithlocus.com, paid per call via MPP, $0.057/call, status unknown (last checked 2026-10-10, last successful call 2026-06-16).
Transforms a sketch or line art image into a fully rendered image guided by a text prompt, using Stability AI's ControlNet-style sketch conditioning
Price / call$0.057
Success50%
StatusUnknown
How this service works
Convert a rough sketch into a detailed image guided by a prompt.
Output
A fully rendered image (JPEG, PNG, or WebP) generated by using the provided sketch or line art as a structural guide combined with the text prompt, respecting the specified control strength for how closely the output follows the input sketch
Example use cases
Example prompt
“Take this sketch image I'm uploading and render it as a detailed fantasy landscape painting — the prompt is 'mystical forest with glowing mushrooms and misty atmosphere', exclude any urban or modern elements, and keep the sketch adherence at 0.8, output as PNG.”
Technical details
Endpoint
POSThttps://stability-ai.mpp.paywithlocus.com/stability-ai/sketch?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you have an existing sketch, line drawing, wireframe, or rough outline and want to generate a finished image that preserves the structural composition. Ideal for concept artists, designers turning wireframes into visuals, or anyone who wants AI to render their hand-drawn ideas while respecting the original layout. Prefer this over pure text-to-image (Generate SD3) when compositional control from an existing drawing is needed, or over Structure when the input is specifically a sketch/line art rather than a detailed photo.
Side effects
- Missing required 'image' field — returns validation error
- Missing required 'prompt' field — returns validation error
- Invalid control_strength value outside 0–1 range — returns parameter error
- Unsupported output_format value — returns validation error
- Image file too large or unsupported format — returns upload error
- Payment insufficient or USDC balance too low — returns payment error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | number | Random seed |
| imagerequired | string | Sketch / line art image Send a public HTTPS URL (recommended; files up to 10 MiB) or base64/data URI. Hosted MPP JSON requests must stay below 8 KiB, so use a URL for larger files. |
| promptrequired | string | Target image description |
| output_format | string | jpeg|png|webp |
| negative_prompt | string | Things to exclude |
| control_strength | number | Sketch adherence 0–1 (default 0.7) |
Tags
image-generationstable-diffusionupscaling3daimedia
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