All Slide Tailor operations are available through a single REST endpoint. By POSTing a TailoringInstructions object to https://api.slide-tailor.com/tailor, you can make any number of customizations to a PowerPoint template.
Customization Operations
Change Text - Search for text throughout the presentation--in slides, masters, charts, notes, etc--and replace it. Example
Insert Image - Replace an existing image or any other shape with a new image. Example