io.github.JuanCF/scrcpy-mcp MCP Server

scrcpy-mcp

MCP server that gives AI agents full vision and control over Android devices via ADB and scrcpy.

Connect any MCP-compatible AI assistant (Claude Code, OpenCode, Cursor, VS Code Copilot, etc.) to your Android device. The AI can see the screen, tap, swipe, type, launch apps, inspect UI elements, transfer files, and run shell commands.

Features

• 44 tools covering screenshots, input, apps, UI automation, shell, files, clipboard, video streaming, and audio streaming/recording
• scrcpy-first: uses scrcpy's binary control protocol for 10-50x faster input and near-instant screenshots (~33ms)
• ADB fallback: interaction tools work without scrcpy — slower but always available (the audio tools start_audio_stream/audio_record_start and the video stream require scrcpy)
• Image-returning screenshots: the AI actually sees the screen, not just a file path
• UI element finding: ui_find_element returns tap coordinates so the AI can act on what it sees
• Audio streaming & recording: stream device audio to host speakers (start_audio_stream) or capture to .wav/.opus (audio_record_start)
• Clipboard that works on Android 10+: scrcpy bypasses the restrictions that break ADB-only solutions

Prerequisites

Required

Requirement	Install	Verify
Node.js 24+	nodejs.org or nvm install (uses .nvmrc)	node --version
ADB (Android Platform Tools)	developer.android.com/tools/releases/platform-tools	adb version
Android device with USB debugging (Android 11+ for audio)	Settings → Developer Options → USB Debugging	adb devices

Optional (for enhanced performance)

Requirement	Install	Benefit
scrcpy	github.com/Genymobile/scrcpy	10-50x faster input, ~33ms screenshots
ffmpeg	apt install ffmpeg / brew install ffmpeg	Required for scrcpy video stream decoding, audio recording, and audio clip capture
ffplay	Usually packaged with ffmpeg	Required for audio playback and the MJPEG viewer window

Device setup

1. Enable Developer Options: Settings → About Phone → tap "Build Number" 7 times
2. Enable USB Debugging: Settings → Developer Options → USB Debugging
3. Connect device via USB
4. Accept the RSA fingerprint prompt on the device
5. Verify: adb devices should show your device as device (not unauthorized)

Installation

# Run directly with npx (no install needed)
npx scrcpy-mcp

# Or install globally
npm install -g scrcpy-mcp

MCP Client Configuration

Claude Code

claude mcp add android -- npx scrcpy-mcp

Or add to .mcp.json in your project root:

{
  "mcpServers": {
    "android": {
      "command": "npx",
      "args": ["scrcpy-mcp"]
    }
  }
}

OpenCode

Add to .mcp.json:

{
  "mcpServers": {
    "android": {
      "command": "npx",
      "args": ["scrcpy-mcp"]
    }
  }
}

Cursor

Settings → MCP → Add Server:

{
  "android": {
    "command": "npx",
    "args": ["scrcpy-mcp"]
  }
}

Claude Desktop

Edit ~/.config/Claude/claude_desktop_config.json (Linux) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "android": {
      "command": "npx",
      "args": ["scrcpy-mcp"]
    }
  }
}

VS Code (GitHub Copilot)

Add to .vscode/mcp.json:

{
  "servers": {
    "android": {
      "command": "npx",
      "args": ["scrcpy-mcp"]
    }
  }
}

Customizing Environment Variables

If you need to configure custom options (such as pointing to a non-standard scrcpy-server path), you can add the "env" object to your server configuration. For example:

{
  "mcpServers": {
    "android": {
      "command": "npx",
      "args": ["scrcpy-mcp"],
      "env": {
        "SCRCPY_SERVER_PATH": "C:\\path\\to\\scrcpy-server"
      }
    }
  }
}

Note: only set SCRCPY_SERVER_VERSION if version auto-detection fails — it overrides detection, so a stale value causes the version mismatch described in Troubleshooting. Match it to your installed scrcpy (scrcpy --version).

Note: On Windows, remember to double-escape backslashes (\\) in your configuration paths.

OpenCode users: OpenCode uses "environment" instead of "env" for passing environment variables to MCP servers. Replace "env" with "environment" in the example above if you're configuring scrcpy-mcp in opencode.json.

Tool Reference

Session Management

Tool	Description
start_session	Start a scrcpy session. When active, input and screenshots use the fast path (10-50x faster).
stop_session	Stop the scrcpy session. Tools fall back to ADB.
version	Report which scrcpy-server version the session pushes and where that version was resolved from.

start_session options:

Option	Default	Description
maxSize	1024	Max video frame dimension in pixels
maxFps	30	Max frames per second
audio	false	Capture audio (see the heads-up below)
audioSource	output	Audio source (output, playback, mic, voice-call, …)
audioDup	false	Keep device playback audible with audioSource: "playback" (Android 13+)
stayAwake	false	Keep the device on for the whole session (scrcpy --stay-awake). Applies only while the device is plugged in.
screenOffTimeout	(device setting)	Screen-off timeout in seconds for the whole session (scrcpy --screen-off-timeout). Works on battery too. Needs scrcpy 2.5+.

Both screen-awake options are temporary: scrcpy restores the device's original values when the session ends, including when a tool restarts the session to turn audio on.

Video Streaming

Tool	Description
start_video_stream	Start an HTTP MJPEG video stream and open a viewer window (ffplay). Auto-starts a scrcpy session if needed.
stop_video_stream	Stop the video stream and close the viewer window.

Audio Streaming & Recording

Heads up: Audio capture is opt-in and requires Android 11+. The default source output uses REMOTE_SUBMIX, which mutes the device's own speakers while capturing — the audio is moved to the host, not copied. Use audioSource: "playback" with audioDup: true (Android 13+) to keep the device audible. Recordings are saved on the host filesystem.

Tool	Description
start_audio_stream	Stream device audio to the host's speakers via ffplay. Restarts the scrcpy session if it was started without audio.
stop_audio_stream	Stop streaming audio to the host.
audio_record_start	Start recording device audio to .wav (default) or .opus on the host. Restarts the scrcpy session if needed. Stops automatically after maxDuration seconds (default 300).
audio_record_stop	Stop the recording and finalise the host-side file.
audio_capture	Capture a bounded clip of device audio and return it as an audio content block. Restarts the scrcpy session if needed. durationSeconds defaults to 5 (integer, max 30; a 5s default becomes 2.5s when ffmpeg has no libopus and the WAV fallback is used). audioSource/audioDup default to the running audio session's settings, so a clip can be taken during a recording or stream without interrupting it.

Device Management

Tool	Description
device_list	List all connected devices with serial, state, and model
device_info	Get model, Android version, screen size, SDK level, battery
screen_on	Wake the device screen
screen_off	Turn the screen off
rotate_device	Rotate the screen (requires active session)
expand_notifications	Pull down the notification panel (requires active session)
expand_settings	Pull down the quick settings panel (requires active session)
collapse_panels	Collapse notification/settings panels (requires active session)
connect_wifi	Enable WiFi ADB and connect to the device wirelessly. Returns the connection address.
disconnect_wifi	Disconnect from a wireless ADB device

Vision

Tool	Description
screenshot	Capture the screen and return it as an image. ~33ms with scrcpy, ~500ms via ADB.
screen_record_start	Start recording the screen to a file on the device
screen_record_stop	Stop recording and optionally pull the file to the host

Input Control

All input tools use scrcpy (~5-10ms) when a session is active, otherwise fall back to ADB (~100-300ms).

Tool	Description
tap	Tap at screen coordinates
swipe	Swipe from one point to another
long_press	Long press at coordinates
drag_drop	Drag from one point to another
input_text	Type a text string into the focused field
key_event	Send a key event: HOME, BACK, ENTER, VOLUME_UP, VOLUME_DOWN, POWER, etc.
scroll	Scroll at a position (dx=horizontal, dy=vertical)

App Management

Tool	Description
app_start	Launch an app by package name. Prefix with + to force-stop before launch.
app_stop	Force-stop an app
app_install	Install an APK from the host machine
app_uninstall	Uninstall an app
app_list	List installed packages, optionally filter by name or system/third-party
app_current	Get the current foreground app and activity

UI Automation

Tool	Description
ui_dump	Dump the full UI hierarchy as XML
ui_find_element	Find elements by text, resource ID, class name, or content description. Returns tap coordinates.

Shell & Files

Tool	Description
shell_exec	Execute an arbitrary ADB shell command and return the output
file_push	Push a file from the host machine to the device
file_pull	Pull a file from the device to the host machine
file_list	List directory contents on the device

Clipboard

Tool	Description
clipboard_get	Get clipboard content. Uses scrcpy to bypass Android 10+ restrictions.
clipboard_set	Set clipboard content. Pass paste: true to also paste immediately.

Performance

Operation	scrcpy (session active)	ADB fallback
Screenshot	~33ms	~500ms
Tap / Swipe	~5-10ms	~100-300ms
Text input	~5ms	~100-300ms
Clipboard	~10ms	unreliable on Android 10+

Start a session once at the beginning to unlock the fast path:

start_session → take screenshots → tap → swipe → ...

Environment Variables

Variable	Default	Description
ADB_PATH	adb	Path to the ADB binary
ANDROID_SERIAL	(none)	Default device serial, overrides auto-detection
SCRCPY_SERVER_PATH	(auto)	Path to the scrcpy-server binary
SCRCPY_SERVER_VERSION	(auto)	Version of the scrcpy-server binary
FFMPEG_PATH	ffmpeg	Path to the ffmpeg binary
FFPLAY_PATH	ffplay	Path to the ffplay binary (video stream viewer and audio playback)

When only one device is connected, tools auto-detect it. With multiple devices, pass the serial parameter explicitly or set ANDROID_SERIAL.

Troubleshooting

adb devices shows unauthorized Accept the RSA fingerprint prompt on the device. If the prompt doesn't appear, revoke USB debugging authorizations in Developer Options and reconnect.

start_session fails Make sure scrcpy is installed and the scrcpy-server binary is accessible. On Windows, add the folder containing both scrcpy.exe and scrcpy-server to your PATH, or set SCRCPY_SERVER_PATH to the full path of the scrcpy-server file.

• File vs Directory: Ensure SCRCPY_SERVER_PATH points directly to the scrcpy-server file itself (e.g. C:\path\to\scrcpy-server), NOT to its parent folder.
• Android Directory Conflict: If you previously pushed a directory to the server path, /data/local/tmp/scrcpy-server.jar on the Android device might have been created as a folder. Run adb shell rm -rf /data/local/tmp/scrcpy-server.jar to delete it.
• Version Mismatch: The client must send the exact version of the scrcpy-server file it pushes. To guarantee that, the server and the version are never resolved separately — one scrcpy install is resolved as a pair, and the version comes from the client belonging to that same install. The install is found in this order: SCRCPY_SERVER_PATH if set (its client is then located beside the server, or one prefix step away at ../../bin/scrcpy); otherwise the scrcpy on your PATH, whose server is located beside it or at ../share/scrcpy/scrcpy-server; otherwise whatever your package manager reports (dpkg, pacman, rpm, apk, brew). A symlinked client is resolved to its real directory before its counterpart is derived, so a link farm such as Homebrew's bin/scrcpy pairs with the install it points at rather than with the link's own directory. SCRCPY_SERVER_VERSION overrides the detected version if set. So on Windows, or when a GUI app launches the MCP without your shell PATH, pointing SCRCPY_SERVER_PATH at a server inside a complete scrcpy install is enough on its own, and it wins even if a different scrcpy comes first on your PATH — note that reading the version runs that install's executable, so point SCRCPY_SERVER_PATH only at an install you trust (the same trust the server file itself already requires, since it gets pushed to your device and executed there). If no client can be found for the resolved server (for example a lone scrcpy-server downloaded from the releases page), the client falls back to the default version and the server may exit with a version-mismatch error; set SCRCPY_SERVER_VERSION to your installed version (e.g., "4.1"). Run the version tool to see which version is in use and where it was resolved from. See the Environment Variables table above.

Screenshots are slow (~500ms) Start a scrcpy session with start_session to enable the fast video stream path. Requires scrcpy and ffmpeg.

expand_notifications / expand_settings / collapse_panels fail These tools require an active scrcpy session. Run start_session first.

The device screen keeps turning off during long automations Start the session with stayAwake: true (plugged in only) or screenOffTimeout: <seconds>, which also works on battery. Both are restored when the session ends.

start_audio_stream says ffplay was not found Install ffmpeg (ffplay ships with it), or set FFPLAY_PATH to the binary. The same applies to audio_record_start and FFMPEG_PATH.

Audio recording is silent REMOTE_SUBMIX only captures what apps are actually playing — a recording made while nothing plays is digital silence, which is expected. Also check the device is not muted, and remember the default output source moves the audio to the host, so the device goes quiet while capturing. Use audioSource: "playback" with audioDup: true (Android 13+) to keep it audible.

Audio tools report audio as unavailable Audio capture needs Android 11+ (SDK 30). On older devices the session still works for video, input, and clipboard.

Clipboard doesn't work on Android 10+ ADB clipboard access is restricted on Android 10+. Start a scrcpy session — the scrcpy clipboard protocol bypasses this restriction.

Multiple devices connected Pass serial to each tool or set the ANDROID_SERIAL environment variable.

Security

This server provides full control over connected Android devices. The shell_exec tool can run arbitrary commands, and file_push/file_pull can read and write any file accessible to the shell user.

• The server runs locally over stdio — it is not exposed to the network
• ADB requires USB debugging to be explicitly enabled on the device
• The device must accept your host's RSA key on first connection
• Only connect devices you own and trust the AI agent you are using

License

MIT — see LICENSE