Developer documentation
Build with the Upscayl API
Use one account and a consistent asynchronous task model across Upscayl image APIs. Start with the product guide, then follow the shared reliability rules for production workloads.
Start here
These guides cover the shared concepts every integration needs.
API keys and authentication
Create multiple keys, store them safely on your server, and revoke them independently.
Open guideTasks and status polling
Submit asynchronous work and retrieve the final result with gradual polling backoff.
Open guideRetries and idempotency
Recover from temporary failures without duplicate tasks or duplicate charges.
Open guideBilling and errors
Understand credit reservation, successful charges, failed-task refunds, limits, and error responses.
Open guideImage Upscaler API
Create 2x and 4x image upscaling tasks for product images, creative assets, archives, and user-generated content.
Open the Image Upscaler API guide