High-Level API Documentation Overview

I need a clear, high-level overview of our REST-based API that gives product managers, partners, and non-developer stakeholders immediate insight into what the service offers without diving into granular request/response details. The focus is on: • Explaining the API’s purpose, primary endpoints, and typical use cases in plain language. • Describing authentication and error-handling concepts at a conceptual level rather than listing every status code. • Summarising data formats, rate-limit policies, and versioning so readers can quickly understand integration boundaries. • Presenting one or two illustrative, simplified request/response snippets—just enough to make the workflow tangible. Please deliver a polished document (Markdown or Google Doc preferred) that I can hand straight to our design team for layout. Concise writing, consistent terminology, and an organised structure are essential; aim for roughly 4–6 pages when formatted.