{"access":{"authentication":{"format":"L402 {macaroon}:{proof_of_payment}","header":"Authorization","protocols":["L402","MPP"],"format_mpp":"Payment <base64url_json>"},"endpoint":"https://sats4ai.com/api/l402/upscale-image","method":"POST"},"content_type":"api","cover_url":"","description":"Upscale images 2x or 4x with neural super-resolution. Uses Real-ESRGAN (ICCV 2021, 100M+ production runs on Replicate). Recovers real detail from low-resolution images — not interpolation. Stable endpoint — model upgrades automatically. 5 sats per image, no API key or signup needed.\n\nSend the image as base64 in the body:\n```\n{ \"image\": \"<base64 or data URI>\", \"scale\": 4 }\n```","name":"Image Upscaling","pricing":[{"tier":"Standard","amount":5,"currency":"SATS"}],"response_body":{"image_url":{"type":"string","description":"URL to the upscaled image (temporary, download promptly)"}},"quality":{"model":"Real-ESRGAN","paper":"Real-ESRGAN: Training Real-World Blind Super-Resolution with Pure Synthetic Data (ICCV Workshop 2021)","benchmark":"Set5 4x","scores":{"PSNR":32.73,"SSIM":0.9011},"source":"https://paperswithcode.com/task/image-super-resolution","note":"Industry standard for real-world upscaling. 100M+ runs in production. Stable endpoint — model upgrades behind it as SOTA evolves."}}