| API Governance: Ownership, Standards, Review Process | concept | 1 | Open |
| AsyncAPI and Event-Driven Contracts | concept | 3 | Open |
| Backward- and Forward-Compatibility Rules | concept | 1 | Open |
| Batch Operations, Streaming, and Bulk Patterns | concept | 1 | Open |
| Book Exercise Lanes | exercise | 3 | Open |
| Custom Actions: When CRUD Does Not Fit | concept | 1 | Open |
| Deprecation Policy and Sunset Discipline | concept | 1 | Open |
| GraphQL: Schema-First, Over-fetching, N+1 Concerns | concept | 1 | Open |
| HTTP Verbs, Status Codes, and Idempotency | concept | 1 | Open |
| Learning Resources | resource | 3 | Open |
| Long-Running Operations, Webhooks, and Async Callbacks | concept | 1 | Open |
| Migration windows, rollback and retry semantics | concept | 1 | Open |
| Pagination, Filtering, Sorting, and Partial Responses | concept | 1 | Open |
| Reference and Selective Reading | reference | 3 | Open |
| Request and response compatibility point in different directions | concept | 1 | Open |
| Resources and URL Design: Nouns, Plurals, Hierarchy | concept | 1 | Open |
| RPC Styles: gRPC, JSON-RPC, and When to Prefer Them | concept | 2 | Open |
| The Developer Experience Lens: Errors, Docs, Consistency | concept | 1 | Open |
| Topic-Specific Reading Assignment | other | 1 | Open |
| Use counterexamples without overstating the checker | concept | 1 | Open |
| Versioning Strategies: URL, Header, Content Negotiation | concept | 1 | Open |
| What an API Contract Is and Who It Is For | concept | 2 | Open |