API Cat adds image processing features to third-parties. The API is capable of resizing, cropping, converting, and watermarking images. This API talks JSON and requires API Keys for authentication. API Cat is free to start by limiting requests to 1,000 per month.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.