Documentation
Getting Started
Basics
Agentic Flows
Text Embedding
Tokenization
Getting Started
Basics
Agentic Flows
Text Embedding
Tokenization
Getting Started
Project Setup
Set up your lmstudio-python
app or script.
lmstudio
is a library published on PyPI that allows you to use lmstudio-python
in your own projects.
It is open source and developed on GitHub.
You can find the source code here.
lmstudio-python
As it is published to PyPI, lmstudio-python
may be installed using pip
or your preferred project dependency manager (pdm
and uv
are shown, but other
Python project management tools offer similar dependency addition commands).
pip install lmstudio
All of the examples in the documentation assume that the server API is running locally on one of the default application ports (Note: in Python SDK versions prior to 1.5.0, the SDK also required that the optional HTTP REST server be enabled).
The network location of the server API can be overridden by
passing a "host:port"
string when creating the client instance.
import lmstudio as lms
SERVER_API_HOST = "localhost:1234"
# This must be the *first* convenience API interaction (otherwise the SDK
# implicitly creates a client that accesses the default server API host)
lms.configure_default_client(SERVER_API_HOST)
# Note: the dedicated configuration API was added in lmstudio-python 1.3.0
# For compatibility with earlier SDK versions, it is still possible to use
# lms.get_default_client(SERVER_API_HOST) to configure the default client
Required Python SDK version: 1.5.0
While the most common connection pattern is to let the SDK raise an exception if it can't connect to the specified API server host, the SDK also supports running the API check directly without creating an SDK client instance first:
import lmstudio as lms
SERVER_API_HOST = "localhost:1234"
if lms.Client.is_valid_api_host(SERVER_API_HOST):
print(f"An LM Studio API server instance is available at {SERVER_API_HOST}")
else:
print("No LM Studio API server instance found at {SERVER_API_HOST}")
Required Python SDK version: 1.5.0
When no API server host is specified, the SDK queries a number of ports on the local loopback interface for a running API server instance. This scan is repeated for each new client instance created. Rather than letting the SDK perform this scan implicitly, the SDK also supports running the scan explicitly, and passing in the reported API server details when creating clients:
import lmstudio as lms
api_host = lms.Client.find_default_local_api_host()
if api_host is not None:
print(f"An LM Studio API server instance is available at {api_host}")
else:
print("No LM Studio API server instance found on any of the default local ports")
This page's source is available on GitHub
On this page
Installing lmstudio-python
Customizing the server API host and TCP port
Checking a specified API server host is running
Determining the default local API server port