Python 3.12

Run Python 3.12 Online

Execute Python code instantly in a secure, isolated sandbox. No setup, no installs — just write and run.

About Python

Python is the most popular programming language in the world, widely used for AI/ML, data science, web development, and automation. Its clean syntax and vast ecosystem of libraries make it the go-to choice for beginners and experts alike.

Our sandbox runs Python 3.12 with full standard library support.

Sandbox Features

Secure execution with Docker + gVisor isolation
Python 3.12 with standard library included
Up to 300s execution time (Pro tier)
Stdin support for interactive programs
REST API for programmatic access
No setup or installation required

Use Python with stateful sessions

Open a session once, then call execute repeatedly — variables, files, and installed packages persist between runs. Perfect for code interpreters and REPL-style agents.

# 1. Create a session
curl -X POST https://api.sandboxapi.dev/v1/sessions \
  -H "X-RapidAPI-Key: $KEY" \
  -d '{"language":"python3","idle_ttl":300}'
# → {"id":"sess_abc","language":"python3",...}

# 2. Execute — first call
curl -X POST https://api.sandboxapi.dev/v1/sessions/sess_abc/execute \
  -H "X-RapidAPI-Key: $KEY" \
  -d '{"code":"x = 42"}'

# 3. Execute again — state carries over
curl -X POST https://api.sandboxapi.dev/v1/sessions/sess_abc/execute \
  -H "X-RapidAPI-Key: $KEY" \
  -d '{"code":"print(x * 2)"}'

Read the sessions docs →