Axum

Axum — API framework for building REST and GraphQL backends.

API ServicesComplex

Stack Components

FrameworkAxum 0.8

RustRust 1.83

TypeType-safe

Why

Structured API development with routing, validation, serialization, and documentation. API-first design enables 3x faster integrations per MongoDB's 2024 survey. tRPC and Hono eliminate OpenAPI boilerplate while preserving end-to-end type safety across the stack.

When

Use for backend API services and microservices. Avoid for full-stack SSR (use a meta-framework).

How

1. Install Axum 2. Define routes/handlers 3. Add middleware/validation 4. Deploy 5. Add environment configuration — cp .env.example .env && edit values 6. Run tests — npm test or pnpm test to verify setup 7. Deploy — git push to trigger CI/CD or manual deploy

Example

// Axum route app.get('/users/:id', async (c) => { const user = await getUser(c.req.param('id')); return c.json(user); });

Common Problems

⚠Axum route handler too fat — extract services and keep handlers thin
⚠No input validation — use {ne} schema validation or Zod
⚠Configuration drift between environments — use infrastructure-as-code (Terraform/Pulumi) to keep dev/staging/prod identical

Best Practices

✓Use Axum middleware for cross-cutting concerns (auth, logging)
✓Generate OpenAPI spec from {ne} routes for client SDKs
✓Set up health checks and graceful shutdown — handle SIGTERM to drain in-flight requests before exit

FAQ

What is Axum and what projects is it for?

Axum — API framework for building REST and GraphQL backends. It pairs layered technologies for end-to-end type safety and out-of-the-box deploys, fitting everything from MVPs to production SaaS.

How do I spin up a working demo with Axum in 10 minutes?

Two steps: (1) Install Axum; (2) Define routes/handlers. Get the local dev server running, then wire one real data source to verify the end-to-end loop.

What is the most common pitfall with Axum and how do I avoid it?

The most common pitfall is: Axum route handler too fat — extract services and keep handlers thin. Avoid it by adding the matching checklist to your PR template and running type-check + lint + unit tests in CI — three gates before merge.

What are the best practices for Axum?

Best practices for Axum include: Use Axum middleware for cross-cutting concerns (auth, logging); Generate OpenAPI spec from {ne} routes for client SDKs; Set up health checks and graceful shutdown — handle SIGTERM to drain in-flight requests before exit. The first one — "Use Axum middleware for cross-cutting concerns (auth, logging)" — should be set up at project init to avoid costly rework later.

When should I NOT choose Axum?

Pick something else in three cases: (1) the team has zero experience with the core framework and the deadline is tight (learning-curve risk); (2) it's a pure content/marketing site (Astro is lighter); (3) you need very high throughput (>10k RPS) or strict-consistency microservices (Go/Rust). Axum shines for mid-to-high complexity full-stack and API work — don't over-engineer simple static pages with it.