The Sandbox provides some basic network tools. You can run web services and expose them to the internet behind SSL-terminated endpoints. This is useful for web development, API testing, and running interactive applications with LLMs (think v0, reflex.build, etc).

​
Dynamic preview URLs

​
Expose a port

from beam import Sandbox, Image, PythonVersion

sandbox = Sandbox(image=Image(python_version=PythonVersion.Python311))
sb = sandbox.create()

# Expose port 8000
url = sb.expose_port(8000)
print(f"Port 8000 exposed at: {url}")

# The URL will be something like:
# https://384ced3c-f837-4429-bada-39e0b965c9f4-8000.app.beam.cloud

​
Expose multiple ports

# Expose multiple ports
ports = [8000, 8080, 3000]
urls = {}

for port in ports:
    url = sb.expose_port(port)
    urls[port] = url
    print(f"Port {port} exposed at: {url}")

# Access different services
print(f"Main app: {urls[8000]}")
print(f"Admin panel: {urls[8080]}")
print(f"API server: {urls[3000]}")