Serinus - The modular Backend for your Flutter apps

v2.1 - Morning Song

Backend
for Dart.

Opinionated to just the right degree.

The opinionated Dart backend framework designed to work seamlessly with Flutter and Dart applications. Skip the learning curve & build server-side apps with the language you already know.

Get Started Join Community

$dart pub global activate serinus_cli

EntrypointModuleController

dart

import 'package:serinus/serinus.dart';

import 'app_module.dart';

Future<void> main() async {
  final app
 = await serinus.createApplication(
    entrypoint: AppModule(),
  );
  await app.serve();
}

dart

import 'package:serinus/serinus.dart';

import 'app_controller.dart';

class AppModule
 extends Module
 {
  AppModule
() : super
(
    controllers: [AppController()],
  );
}

dart

import 'package:serinus/serinus.dart';

class AppController
 extends Controller
 {

  AppController
() : super
('/') {
    on(Route.get('/'), _handleHelloWorld
);
  }

  Future<String
> _handleHelloWorld(RequestContext
 context
) async {
    return 'Hello, World!';
  }
}

Modular by Design

Features

Powerful
by design

Designed to make backend development in Dart easy and enjoyable. Avoid unnecessary complexity. Focus on your application.

Just Return

Return anything from handlers: Strings, Maps, Lists, Streams, Files, Futures. Zero boilerplate.

Specialized Tools

Hooks, Exception Filters, and Pipes. Full control over your application flow.

Real-time Ready

WebSockets and SSE built-in. Push updates instantly with zero config.

Universal Adapters

REST APIs, Microservices, and more. Same framework, different adapters.

Type-Safe

Leverage Dart's type system. Catch errors at compile time, not runtime.

OpenAPI Native

Unique in Dart. Generate complete API docs with just one import.

AI-Ready

Built for the
agentic era

Serinus provides the files AI agents and LLMs need to understand, discover, and interact with your application.

Documentation

AGENTS.md

Generate a comprehensive AGENTS.md (or CLAUDE.md) file for your team, detailing Serinus capabilities, best practices, and example patterns for your use case.

Skill Generation

Skills

Generate all the skills needed to develop your applications, from a minimal application to a fully modular application connected to microservices.

LLM Reference

llms.txt

Serinus website ships with a llms.txt, making it extremely AI-friendly and providing a single source of truth for all LLM-related information about Serinus.

$serinus agents

OpenAPI

OpenAPIGenerate complete API documentation automatically.

DatabaseUse your database as a source of truth with an intuitive ORM.

AuthFlexible authentication with hooks and middlewares.

CronSchedule background tasks with cron expressions.

WebSocketsReal-time bidirectional communication

TestingBuilt-in utilities for testing your applications.

ConfigEnvironment-based configuration.

COMMUNITY

Community

Build with
like-minded
developers