xa11y 0.5.0

Cross-platform accessibility client library

xa11y

Cross-platform accessibility library for reading and interacting with accessibility trees. One API for macOS, Windows, and Linux.

Use cases: UI testing, AI agent tooling, assistive technology, desktop automation.

Documentation | Rust API | Python API

Quick Example

import xa11y

# Find elements with CSS-like selectors via locator
app = xa11y.locator('application[name="Safari"]')
for button in app.descendant("button").elements():
    print(button.name)

# Interact with elements via locator (re-resolves every call)
app.descendant("button[name='Submit']").press()

app.descendant("text_field[name^='Search']").set_value("hello world")

Installation

pip install xa11y

Requires Python 3.9+. Pre-built wheels available for Linux, macOS, and Windows.

macOS: Grant your terminal two permissions in System Settings > Privacy & Security:

1. Accessibility — required for all accessibility API access.
2. Screen & System Audio Recording (macOS 26+) — required to read window content. Without this, only menu bars are visible.

Restart your terminal after changing permissions.

Linux: AT-SPI2 must be running (default on GNOME/most DEs). No special permissions needed.

Windows: No special permissions needed.

Selector Syntax

Query accessibility trees with CSS-like selectors:

Pattern	Meaning
button	Elements with role Button
button[name='OK']	Button named exactly "OK"
textfield[name^='Search']	Text field whose name starts with "Search"
textfield[name*='email']	Text field whose name contains "email"
group > button	Buttons that are direct children of a group
window button	Buttons anywhere inside a window
button:nth(2)	The 2nd button match

Supported Actions

Action	Description
press	Click / activate
focus / blur	Move or remove keyboard focus
toggle	Toggle a checkbox or switch
expand / collapse	Expand or collapse a disclosure
select	Select an item
set_value	Set a text field's value
type_text	Type text into an element
increment / decrement	Adjust a slider or stepper
scroll	Scroll in a direction
show_menu	Open a context menu

Platform Support

Platform	Backend
macOS	AXUIElement
Linux	AT-SPI2 (D-Bus)
Windows	UI Automation

Contributing

git clone https://github.com/xa11y/xa11y && cd xa11y
cargo build --workspace
cargo xtask check   # fmt, lint, test, python bindings

See the development docs for architecture and setup.

License

MIT. All dependencies are permissively licensed (MIT, Apache-2.0, BSD, or similar), enforced via cargo-deny.