Part 4: Building Web APIs

This part shows how to expose your EventCore application through HTTP APIs. We’ll cover command handlers, query endpoints, authentication, and API design best practices.

Chapters in This Part

  1. Setting Up HTTP Endpoints - Web framework integration
  2. Command Handlers - Exposing commands via HTTP
  3. Query Endpoints - Building read APIs with projections
  4. Authentication and Authorization - Securing your API
  5. API Versioning - Evolving APIs without breaking clients

What You’ll Learn

  • Integrate EventCore with popular Rust web frameworks
  • Design RESTful and GraphQL APIs for event-sourced systems
  • Handle authentication and authorization
  • Build efficient query endpoints using projections
  • Version your API as your system evolves

Prerequisites

  • Completed Part 3: Core Concepts
  • Basic understanding of HTTP and REST APIs
  • Familiarity with at least one Rust web framework helpful

Framework Examples

This part includes examples for:

  • Axum - Modern, ergonomic web framework
  • Actix Web - High-performance actor-based framework
  • Rocket - Type-safe, developer-friendly framework

Time to Complete

  • Reading: ~45 minutes
  • With implementation: ~2 hours

Ready to build APIs? Let’s start with Setting Up HTTP Endpoints →