Glass vs Agent Droid Bridge — MCP Server Comparison | AllMCPs
Side-by-Side Model Context Protocol Comparison
Glass vs Agent Droid Bridge
In-depth architectural comparison of the Glass and Agent Droid Bridge MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Glass
OS Automation · Local stdio
Quality: 48/100 (Fair) | Auth: No auth required
Agent Droid Bridge
OS Automation · Local stdio
Quality: 60/100 (Good) | Auth: No auth required
Verdict Summary: Choose Glass if you need specialized OS Automation tools running via a local process. Choose Agent Droid Bridge if your workspace requires OS Automation integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.
Which MCP Server Should You Choose?
Choose Glass when:
You need dedicated capabilities in the OS Automation domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Cross-platform support: Linux (X11/Wayland), Windows, macOS, Android emulator, iOS Simulator, Access and interact with app accessibility trees for semantic control, Inject native accessibility actions or synthetic pointer input.
Gives a coding agent a build → see → interact → debug loop over the native GUI app it is writing: launch the app, screenshot it, read its accessibility tree, inject mouse/keyboard/gestures, tail its logs, and diff frames to confirm a change landed. Drives apps as an external black box with no app integration, so any toolkit or language works. 30 tools with text-first responses (element ids, diffs, waits) so the agent need not screenshot every step, plus optional sandboxing of the launched app. Backends: X11, Wayland, Windows, macOS, Android emulators, and the iOS Simulator.
MCP server giving AI agents programmatic control over Android devices and emulators via ADB. 11 tools covering UI inspection, screen interaction, ADB commands, and change detection.
Tools & Capabilities Breakdown
Glass Tools (6)
Cross-platform support: Linux (X11/Wayland), Windows, macOS, Android emulator, iOS Simulator
Access and interact with app accessibility trees for semantic control
Inject native accessibility actions or synthetic pointer input
Visual diffing with bounding box and change percentage
Log tailing from the launched application
Optional sandboxing of launched apps
Agent Droid Bridge Tools (14)
Ready-to-Paste Client Configurations
Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).
Glass is categorized under OS Automation and uses a local stdio subprocess. In contrast, Agent Droid Bridge belongs to OS Automation using local stdio subprocess. Select Glass when you need capabilities focused on os automation and Agent Droid Bridge when you require tools for os automation.
Returns the current Android screen as an XML UI hierarchy.
Use this when you need to locate element coordinates, read text, or find resource IDs to
interact with. Do not call this after every action — only call it when you actually need to
read screen content. To check if the screen changed after an action, use snapshot_ui before
the action and detect_ui_change after.
tap_screen
A tap gesture at the given pixel coordinates on the Android screen.
swipe_screen
A swipe gesture on the Android screen from (x1,y1) to (x2,y2) over the given duration.
type_text
Text input into the currently focused Android input field.
Spaces are encoded automatically.
press_key
A key event sent to the Android device using the given keycode integer.
take_screenshot
A PNG screenshot of the current Android device screen with width, height,
and base64-encoded image data.
list_devices
All Android devices currently visible to ADB, with their serial numbers,
connection state, and model names.
launch_app
An Android app launched by its component name (package/activity).
execute_adb_command
The output of an ADB command. Parsed safely via shlex and never passed to a system shell.
snapshot_ui
Takes a lightweight snapshot of the current UI state and returns a short token.
Use this before performing an action (tap, swipe, launch, key press) when you only need to
confirm the screen changed afterward — not read its content. Pass the returned token to
detect_ui_change as baseline_token. This avoids loading the full XML hierarchy into context
unnecessarily. Do not use this when you need to read or interact with screen elements — use
get_ui_hierarchy for that.
detect_ui_change
Polls the UI hierarchy after an action and returns when the screen content changes or the
timeout is reached. Returns changed status and elapsed time. By default, omits the XML
hierarchy for efficiency — set return_hierarchy=True to receive the full hierarchy.
For efficient change detection: call snapshot_ui before the action, perform the action, then
call detect_ui_change with baseline_token. Only use without baseline_token when you need to
wait for a slow transition (loading screens, animations). Do not use to read the current
screen state — use get_ui_hierarchy for that.
get_screen_elements
Structured list of UI elements currently visible on the Android screen.
Returns elements filtered and shaped by the chosen mode. Prefer 'tappable' for
navigation and 'interactive' when you need XPath or bounds for ADB commands.
Only use 'all' as a last resort — it returns every node and can be large.