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// Live runtime demo

🐍 Python FastAPI

A real CPython interpreter serving requests from a Docker container on private hardware, through a Cloudflare Tunnel. Every value below is read live from the running process on each request.

Python version
Implementation
FastAPI
Uptime
Server
CPU cores
PID
Host · machine

Exercise the interpreter

Compute n! exactly using Python's built-in arbitrary-precision int — no overflow, ever. The work runs on the server; you get back the digit count and how long CPython took.

n
digits in n!
computed in
first 20 digits
last 20 digits
GET /python/api/info — live responseloading…

Auto-refreshes every 5s · served by uvicorn on a host that won't be online 24/7.