🎮 Live demos and sample applications for springdoc-openapi

📖 Documentation · 📦 springdoc-openapi · 🚀 Getting started · ⚙️ Properties · ❓ FAQ

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_{If you ❤️ springdoc-openapi, become a sponsor: it covers the project expenses and helps it grow.}

This repository holds the demo applications of springdoc-openapi: small Spring Boot applications that show how springdoc-openapi documents Web MVC, WebFlux, Spring Cloud and MCP applications. Every push to master builds them and deploys the public ones, so you can try them right now in your browser. ✨

🌐 Live demos

Demo	What it shows	Try it	Source
🍃 Web MVC	A Spring Web MVC API documented with Swagger UI	▶️ Open	📂
⚡ WebFlux	A reactive Spring WebFlux API documented with Swagger UI	▶️ Open	📂
🎨 Web MVC and Scalar	The Web MVC demo with the Scalar API reference	▶️ Open	📂
🎨 WebFlux and Scalar	The WebFlux demo with the Scalar API reference	▶️ Open	📂
🔀 WebFlux functional endpoints	Router functions documented with springdoc's `SpringdocRouteBuilder`	▶️ Open	📂
🔗 Spring HATEOAS	Hypermedia APIs with HAL links	▶️ Open	📂
☁️ Spring Cloud Function, Web MVC	Functions exposed as REST endpoints	▶️ Open	📂
☁️ Spring Cloud Function, WebFlux	Reactive functions exposed as REST endpoints	▶️ Open	📂
🚪 Microservices	Spring Cloud Gateway, Eureka and Config, with the API docs of every service in one Swagger UI	▶️ Open	📂
🤖 MCP server	Spring AI MCP Server: REST endpoints exposed as MCP tools for AI agents, with an MCP UI	▶️ Open	📂
🔐 MCP authorization server	The OAuth 2 authorization server that secures the MCP demo	▶️ Open	📂

Tip

The demos run on Cloud Run and scale to zero: the first request after a quiet period can take a few seconds. ⏳

📦 More samples

These samples are not deployed, but you can run them locally:

Sample	What it shows
📚 demo-book-service	A CRUD REST API with a global exception handler
🧑 demo-person-service	Bean Validation constraints (`@Valid`, `@NotBlank`, `@Size`) in the generated schemas
🗄️ demo-spring-data-rest	Spring Data REST repositories documented automatically
🔐 demo-oauth2	OAuth 2 resource servers, Web MVC and WebFlux, with an authorization server

🏃 Run a demo locally

You need Java 17+ and Maven:

git clone https://github.com/springdoc/springdoc-openapi-demos.git
cd springdoc-openapi-demos
mvn -pl demo-spring-boot-webmvc spring-boot:run

Then open the Swagger UI on the port set in the demo's application.yml (for this one 👉 http://localhost:8081).

🧭 Branches

Branch	Spring Boot	springdoc-openapi
🍃 `master`	4.x	3.x
🍃 `spring-boot-3`	3.x	2.x
🍂 `2.x`	2.x	1.x

💬 Getting help

🙏 Thanks

Special thanks to the Spring team and JetBrains for their support.

📄 License

The demos are Open Source software released under the Apache 2.0 license.