You Tracker offers the Image Watermarker API, which allows users to add a picture or text watermark to an image in whatever size, opacity, location, font, or color that they want. Examples of watermarked images and basic documentation for the API are provided on the You Tracker website. The API is free for public use.
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.