Languages & Frameworks

Pick your language below to get a ready-to-deploy hello world API server. Each template returns {"message": "Hello World"} as JSON using the language’s most popular web framework.

No account needed — grab the code, run it locally, and deploy when you’re ready.

Node.js

Express hello world API server.
A single file with GET / returning JSON.
View template →

TypeScript

TypeScript + Express with full type annotations.
Zero-config with tsx for instant execution.
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Python

FastAPI async hello world.
Automatic OpenAPI docs at /docs.
View template →

Go

Gin web framework hello world.
Lightweight and fast, just go run.
View template →

Rust

Actix-web async hello world with Serde.
Strongly typed JSON responses out of the box.
View template →

Java / Spring Boot

Spring Boot REST controller.
Production-ready with Maven wrapper included.
View template →