Core Concepts
Understand the key concepts behind the Kwill platform.
Learn the foundational concepts that power Kwill.
Overview
These pages explain the behaviours and constraints that apply across every Kwill API endpoint.
| Concept | Summary |
|---|---|
| Errors | HTTP status codes and structured error payloads returned by the API |
| Rate Limits | Request quotas per API key and how to handle 429 responses |
| Pagination | Cursor-based pagination for list endpoints |
| Plans & Frozen Workspaces | How workspace plan limits affect API access |
| Draft-Only Invoices | Why invoices created via the API start in draft status |