Stem
Stem is the official Python library for talking to the Tor Control Port. Developers and relay operators use it for automation, monitoring, and research.
Control Port
Tor exposes a Control Port (9051 by default) through which status, circuits, and configuration can be queried. Stem wraps that interface in Python.
Not for ordinary users
End users of Tor Browser do not need Stem. It is a developer and operator tool.
Category: Tools
This page is a short glossary definition, not a full encyclopedia article. See the Tor glossary A–Z for the rest of the set.