AI Agents
agent-browser
A fast browser-automation CLI built for AI agents.
★ 43.6k starsApache-2.0
View guide →Mobile app automation and verification built for AI coding agents — CLI, MCP server, and Node API
agent-device is an open-source ai agents project by callstack (callstack/agent-device on GitHub). It has 4,936 GitHub stars and 328 forks, is released under the MIT license, and was last updated on GitHub on 8 October 2026.
Decide which apps and platforms your agent must verify — iOS simulator, Android emulator, a physical device, web, or desktop.
Install agent-device globally from npm; it requires Node.js 22.12 or newer (Node 24+ for web automation).
Run the doctor command yourself before handing the CLI to an agent, and review the workflow guides.
Open an app, take an accessibility snapshot, act on a ref, and capture a screenshot as evidence.
Agents inspect app state through token-efficient accessibility trees, refs, and selectors rather than screenshots alone.
Tap or press elements, fill fields, scroll, use gestures, wait, assert state, and handle alerts.
Capture screenshots, video, logs, traces, network data, performance samples, and crash details.
Save working steps as .ad scripts for local use or CI, with export to strict Maestro YAML when needed.
`agent-device mcp` starts a stdio MCP server exposing the same commands as structured tools.
Sessions are scoped to the caller's git worktree, and host-local device claims stop parallel agents from taking over each other's simulators; remote device clouds such as BrowserStack and AWS Device Farm are supported.
Clone the project and enter its directory (or skip the clone and install from npm in the next step).
git clone https://github.com/callstack/agent-device.git
cd agent-deviceInstall agent-device globally; Node.js 22.12+ is required.
npm install -g agent-device@latestRun the doctor check, then open an app and inspect it.
agent-device doctor
agent-device open Contacts --platform ios
agent-device snapshot -iCallstack, the React Native consultancy; the README notes teams at companies such as Expensify and Shopify use it.
Yes, the tool itself is open source under the MIT license. Optional remote device clouds it can connect to (such as BrowserStack or AWS Device Farm) are separate paid services.
No API key is required for the CLI, MCP server, or Node API themselves; you bring your own coding agent (for example Claude Code or Codex) to drive it.
Those tools run test suites that humans write and maintain; with agent-device, an agent reads app state and chooses each command at run time. It complements them — runs can be saved as .ad scripts or exported as strict Maestro YAML.
Run `npm install -g agent-device@latest`, then `agent-device doctor`, open an app with `agent-device open`, and inspect it with `agent-device snapshot -i`.
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Free and open — grab the source, star the repo, and start creating.