( Concepts )

Core concepts

• Concepts

  NestJS for Python

  Looking for NestJS in Python? Austial brings modules, controllers, constructor injection, guards, pipes and interceptors to FastAPI, with a CLI to scaffold it.

• Concepts

  FastAPI project structure

  FastAPI leaves architecture to you. Austial adds modules, dependency injection and a fixed request pipeline on top, so large FastAPI codebases stay organised.

• Concepts

  Dependency injection

  Constructor-based dependency injection for Python, resolved from type hints. Singleton by default, with custom providers and tokens, built on FastAPI.

• Concepts

  Batteries-included framework

  Austial ships the parts a production backend needs: modules, DI, request lifecycle, ORM, auth, multi-tenancy, security, jobs, health checks, testing and a CLI.

( Techniques )

Production techniques

• Techniques

  ORM and migrations

  austial.orm gives Python entities, repositories, a fluent query builder and transactions, wired into dependency injection, with Alembic migrations.

• Techniques

  Authentication and authorization

  Argon2id password hashing, JWT access tokens, rotating refresh tokens, TOTP MFA and role-based guards for Python APIs, built into Austial on FastAPI.

• Techniques

  Multi-tenancy

  Scope every request to a tenant with a tenant guard, a request-scoped tenant context and tenant-aware entities, in Python on FastAPI with Austial.

• Techniques

  Background jobs

  Run work off the request path with a job queue, workers that retry with exponential backoff, and @Cron scheduling, built into Austial on FastAPI.

• Techniques

  API security

  Secure response headers, per-route rate limiting, idempotency keys, CSRF protection, PII redaction and envelope encryption for Python APIs with Austial.

• Techniques

  Testing

  austial.testing builds a fully wired application from any set of controllers and providers, so you can unit test services and run e2e HTTP tests in process.

( Tooling )

Tooling

• Tooling

  CLI

  The austial CLI scaffolds a runnable FastAPI-based project, generates modules, controllers, services and full CRUD resources, and serves with auto-reload.

• Tooling

  AI coding agents

  Austial projects ship one AGENTS.md wired to Claude Code, Copilot, Gemini, Windsurf, Cline, Aider and Zed, plus llms.txt docs and a production checklist.

( Compare )

Comparisons

• Compare

  Austial vs FastAPI

  Austial is built on FastAPI, not a replacement. See what it adds, how the two compare on architecture, DI and lifecycle, and when plain FastAPI is enough.