MultiOn

1.3.8 verified Sat May 09 auth: no python

MultiOn provides an API and Python client for AI agents to perform real-world actions on web browsers. Current version 1.3.8 supports Python 3.8+ and integrates with browser automation for tasks like form filling, data extraction, and web navigation. The library is actively maintained with regular updates.

pip install multion

Common errors

error ModuleNotFoundError: No module named 'multion' ↓

cause Package not installed or wrong Python environment.

fix

Run 'pip install multion' and ensure you're using the correct Python environment (virtualenv, conda, etc.).

error ImportError: cannot import name 'MultiOn' from 'multion' ↓

cause Incorrect import path; MultiOn class is in the client submodule.

fix

Use 'from multion.client import MultiOn'

error multion.exceptions.AuthenticationError: Invalid API key ↓

cause Missing or incorrect API key. The key must be set via environment variable MULTION_API_KEY or passed to the MultiOn constructor.

fix

Set MULTION_API_KEY environment variable or pass api_key='your_key' to MultiOn().

Warnings

gotcha The main import path changed; older examples show 'from multion import MultiOn' which no longer works in v1.3.x. ↓

fix Use 'from multion.client import MultiOn'

gotcha When using browse() or act() methods, the session must be created with a valid URL; passing None or empty string may cause cryptic errors. ↓

fix Always provide a URL when calling create_session: client.create_session(url='https://example.com')

deprecated The 'multion.tool' module (for LangChain integration) is deprecated and may be removed in future versions. ↓

fix Use the direct MultiOn client API instead of the LangChain tool wrapper.

Imports

MultiOn
wrong
```
import multion
```
correct
```
from multion.client import MultiOn
```
The main class is in the client module; directly importing multion gives you the package root, not the client.

Quickstart

Initialize the MultiOn client. API key should be set as environment variable MULTION_API_KEY or passed directly.

from multion.client import MultiOn

# Initialize client with your API key (set environment variable MULTION_API_KEY)
import os
client = MultiOn(api_key=os.environ.get('MULTION_API_KEY', ''))