u/Fenixkitdev

A few days ago I launched FenixKit — a set of .NET Minimal API starter kits with MongoDB, Redis cache-aside, and Keycloak JWT auth already wired up.

Just shipped .NET 10 support across all four kits. Both .NET 8 LTS and .NET 10 are now available at the same price — at checkout you pick which version you want and get that ZIP.

What's in the kits:

• BaseRepository with 7 overridable hooks — validation, mapping, slug generation
• ErrorOr result pattern end-to-end, no exceptions for control flow
• Offset + cursor pagination (O(log n) via MongoDB _id index)
• RFC 7807 ProblemDetails on every error
• Docker Compose — one docker compose up starts everything
• Redis edition: tag-based cache invalidation, FailOpen by default
• Keycloak edition: JWT Bearer via OIDC, role policies, OAuth2 PKCE in Swagger, pre-built realm

The idea was simple: every time I started a new API I was wiring up the same infrastructure from scratch. So I packaged the version I'd actually want to start from.

fenixkit.dev — launch code FIRSTXPEOPLE for €15 off

Hey again — a few weeks ago I shared FenixKit, a .NET 8 Minimal API starter kit with Keycloak JWT auth pre-configured (realm import, OIDC, OAuth2 PKCE in Swagger, the works).

Since then I've shipped the next version: MongoDB + Keycloak + Redis — same Keycloak setup, now with a full cache-aside layer on top.

What's new:

• Tag-based Redis invalidation wired into BaseRepository — automatic on every write, no boilerplate
• FailOpen by default — Redis down = cache miss, Keycloak validation and MongoDB writes keep working independently
• Cache:Enabled = false → NullCacheService injected, Redis health check omitted, zero code changes
• Redis 8 on Docker Compose. Valkey 7.2 also supported — docker-compose.valkey.yml included

The Keycloak side hasn't changed: realm import on first docker compose up, two test users, role-based policies, 401/403 as ProblemDetails.

There are now four kits total depending on what you need — MongoDB only, +Redis, +Keycloak, or the full stack. All at https://fenixkit.dev .

GitHub for this one: https://github.com/fenixkitdev/FenixKit-MongoDB-Keycloak-Redis

€55 — use code FIRSTXPEOPLE for €15 off (→ €40).

Happy to answer questions.

Hello, I've been a .NET dev for a while and I kept starting every new API project by rebuilding the same foundation from scratch. Repository pattern, error handling, pagination, database and Docker setup.

So i made a new solution for my recurring problem with the basics, that solution is ".NET 8 Minimal API Starter Kit"

The core idea is a "BaseRepository" with 7 overridable hooks. You inherit it for each resource and only override what your domain actually needs — everything else (CRUD, pagination, validation flow) runs automatically. Adding a new resource takes minutes.

The full hook chain for "CreateAsync" runs in this order: validate → base mapping → "OnMapCreateAsync" (server-side enrichment) → DB insert → "OnMapDetailAsync". Every hook returns "ErrorOr<T>" so if anything fails the operation aborts before touching the database.

Happy to have feedback for things that might be missing for next versions and products.

fenixkit.dev