diff --git a/pyproject.toml b/pyproject.toml
index 17e758d54..d31c4ad48 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,4 @@
+# Python SDK for the AgentEx API — Scale AI's platform for building, deploying, and running AI agents.
 [project]
 name = "agentex-sdk"
 version = "0.9.4"
diff --git a/setup.py b/setup.py
new file mode 100644
index 000000000..b9a17d15b
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,22 @@
+# Agentex Python API library
+#
+# This package provides the official Python SDK for the Agentex REST API, enabling
+# developers to build, deploy, and manage AI agents on the Scale AgentEx platform.
+# It includes type definitions for all request and response types, a Typer-based CLI
+# (agentex), and both synchronous and asynchronous HTTP clients powered by httpx.
+#
+# The SDK supports agent lifecycle management (build, run, debug, deploy), task
+# tracking, secret management, and integrations with Temporal workflows, FastAPI,
+# and LiteLLM for multi-provider LLM support.
+#
+# Install from PyPI:
+#   pip install agentex-sdk
+#
+# For full documentation see: https://docs.gp.scale.com
+
+# This file exists for compatibility with tools that expect a setup.py.
+# The canonical build configuration lives in pyproject.toml.
+from setuptools import setup
+
+# Package: agentex-sdk
+setup()