Agent Device (callstack) MCP Server

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.

People who work with agentic ai, automation and mobile and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-30 · ★ 4,825 · #4 OF 290 MAINTAINED BROWSER AUTOMATION · VERIFIED 2026-09-30

MIT · TypeScript servers · how we verify → /methodology

01 · Install Agent Device (callstack)

Claude Code

claude mcp add callstack-agent-device -- npx -y agent-device

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "callstack-agent-device": {
      "command": "npx",
      "args": [
        "-y",
        "agent-device"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package agent-device - unscoped; check the name against the project README before installing

registry namespace io.github.callstack is GitHub-verified and matches the repo owner

03 · What Agent Device (callstack) can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.21.15 · 2026-09-25

carry the field's hint text on the snapshot node as placeholder · prove request envelopes cover their worst-case work · return from an app open only after the launched app is readable · report readiness work that…

v0.21.14 · 2026-09-25

rewrap the overlong ADR 0013 gesture-schedule line · retire the 1874 diagnose loop · point RUNNER_PROTOCOL.md at the current declarations and document recovery and busy codes · recover the E2E visibility search from a…

v0.21.13 · 2026-09-24

derive selected from the AX bridge traits word · pay for one toolchain in the snapshot bridge identity read (#2712) · bootstrap packages/replay-port with the builtin-vars leaf (#2663) · export touch overlay at capture…

04 · Who maintains Agent Device (callstack)

agent-device is maintained by callstack. It's the only MCP server we track from this author; the repo dates to Jan 2026.

05 · Facts

repository: github.com/callstack/agent-device
category: browser automation - ranked #4 of 290 actively-maintained browser automation servers as of 2026-09-30.
release cadence: 10+ releases in the last 90 days (latest 2026-09-25)
registry: io.github.callstack/agent-device (active, first published 2026-08-07 · 18 versions)
packages: npm:agent-device

06 · Agent Device (callstack) FAQ

What is Agent Device (callstack)?

Is Agent Device (callstack) still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-30 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Agent Device (callstack)?

Run `npx -y agent-device`. You can also paste the ready-made client config above.

Does Agent Device (callstack) run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Agent Device (callstack)

Alternatives to Agent Device (callstack)

Maintained browser automation servers if Agent Device (callstack) isn't the fit.

Pairs well with

Servers that cover what Agent Device (callstack) doesn't - only shown when the pairing reason fits the companion.

head to head · Agent Device (callstack) vs Playwright MCP · Agent Device (callstack) vs Chrome DevTools MCP · Agent Device (callstack) vs SeleniumBase MCP

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