Live API sandbox demos powered by FetchSandbox. Each folder contains a self-contained demo that runs against a real FetchSandbox sandbox — no API keys, no production accounts, no setup.
git clone https://github.com/fetchsandbox/showcases.git
cd showcases
npm install
npm startOpen http://localhost:3000 and pick a demo.
| API | Endpoints | Demo |
|---|---|---|
| Cal.com | 282 | Bookings, Event Types, Schedules, Slots, Profile |
| ElevenLabs | 19 | Voices, Text-to-Speech, Voice Cloning, History |
| VoiceForge | ElevenLabs app | Full narration studio with code reveal — shows every API call goes to FetchSandbox |
| HireDesk | Cal.com app | Interview scheduling platform with code reveal — event types, schedules, bookings |
Each demo is a single HTML file that makes live API calls to fetchsandbox.com. The Cal.com and ElevenLabs demos use a split-screen UI showing the app on the left and network requests on the right. VoiceForge is a full-screen app demo that reveals the source code at the end, highlighting that swapping one URL makes it production-ready.
- We upload a public OpenAPI spec to FetchSandbox
- FetchSandbox parses the spec and generates a stateful sandbox
- The demo HTML calls the sandbox endpoints — create, read, update, delete
- State persists across calls, just like a real API
No mock data. No hardcoded responses. The sandbox generates realistic data from the spec.
Have an OpenAPI spec? Upload it at fetchsandbox.com and get a working sandbox in 60 seconds.
MIT