Agent Device (callstack) vs Argent
Two MCP servers from our browser automation ranking, compared on live data - updated nightly, never sponsored.
Bottom line · 2026-08-25
Agent Device (callstack) records more monthly package installs (586,584 vs 220,495); both are actively maintained, with commits inside the last month.
How they differ in kind
Agent Device (callstack) focuses on: Mobile app automation and verification for AI coding agents. Argent focuses on: Argent is an agentic toolkit that gives your AI assistant direct access to iOS Simulators, Android emulators and physical devices, TVs (Apple TV, Android TV, Fire TV) and Electron/Chromium desktop and web apps. Environment-variable extraction: Agent Device (callstack) yielded no variables extracted; Argent yielded 1 variable.
What each one does
Agent Device (callstack)
Mobile app automation and verification for AI coding agents. Give coding agents a live app feedback loop through a CLI, built-in MCP server, or typed Node.js API. It runs locally over stdio via the published package.
From the project's README.
Argent
Argent is an agentic toolkit that gives your AI assistant direct access to iOS Simulators, Android emulators and physical devices, TVs (Apple TV, Android TV, Fire TV) and Electron/Chromium desktop and web apps. Ask it to tap a button, run a profiler or reproduce an issue manually - all from within your CLI, without switching context. It runs locally over stdio via the published package.
From the project's README.
14 signals, side by side
| Signal | Agent Device (callstack) | Argent |
|---|---|---|
| Monthly installs | 586,584 | 220,495 |
| GitHub stars | 4,212 | 2,199 |
| Last commit | 2026-08-24 | 2026-08-24 |
| Releases · last 90 days | 10+ | 10+ |
| In the registry since | Aug 2026 | Aug 2026 |
| Registry versions | 4 | 1 |
| Documented tools | not extracted - see README | not extracted - see README |
| Env vars extracted | none extracted - see README | 1 |
| Runs | local (stdio) | local (stdio) |
| Endpoint auth | local only | local only |
| Maintenance | actively maintained | actively maintained |
| License | MIT | Apache-2.0 |
| Language | TypeScript | TypeScript |
| Category rank | #3 of 196 | #4 of 196 |
Environment variables found in the READMEs
These are extracted names, not a requiredness check. Project docs may mark them optional or require other setup.
Agent Device (callstack)
No environment variables were extracted from the README setup. Check the project documentation for other authentication or configuration steps.
Argent
- ARGENT_EMULATOR_GPU_MODE
Which one, for what
Derived from the signals above, not hands-on testing.
Pick Agent Device (callstack) if…
- → measured package adoption matters - 586,584 monthly installs
- → category standing - #3 of 196 maintained browser automation servers
Pick Argent if…
- → category standing - #4 of 196 maintained browser automation servers
Who's behind them
Agent Device (callstack) - callstack: 1 MCP server tracked, 1 maintained, 4,212 combined stars.
Argent - software-mansion: 1 MCP server tracked, 1 maintained, 2,199 combined stars.
Not sold on either?
The next-ranked browser automation servers we track:
Quick answers
Is Agent Device (callstack) better than Argent?
Package installs favor Agent Device (callstack): 586,584 monthly installs to 220,495. Argent still ranks #4 of 196 maintained browser automation servers. Data as of 2026-08-25; we haven't hands-on tested either.
Can I use Agent Device (callstack) and Argent together?
Yes - MCP clients accept multiple servers in one config, so you can enable both browser automation servers side by side. If their tools overlap, keep the one whose toolset fits to keep your agent's tool list lean.
What environment variables do their READMEs document?
Agent Device (callstack): no environment variables extracted from the README setup; Argent: 1 environment variable extracted from the README setup. Extraction does not rule out other authentication or configuration steps; check each project's current documentation.
Keep exploring: best browser automation servers · TypeScript servers · all comparisons · every server
Methodology: package-usage signal = npm/PyPI installs (last month, platform APIs) · maintenance = commit recency + release cadence (GitHub) · tool lists and environment-variable names extracted from each project's README · endpoint auth from our own nightly probes. We haven't hand-tested these servers; everything here is data as of 2026-08-25.