Tapp MCP Server

Tapp lets coding agents verify UI changes on real iOS, Android, and web surfaces, then turns reviewed proof into deterministic CI checks. It can inspect and drive screens, explore for technical failures, and save important journeys as replayable tests. It runs locally over stdio via the published package.

People who work with coding agents, e2e testing and github actions and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in JavaScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-14 · ★ 2 · #45 OF 255 MAINTAINED BROWSER AUTOMATION · VERIFIED 2026-09-18

MIT · JavaScript servers · how we verify → /methodology

01 · Install Tapp

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add aarwitz-tapp -- npx -y @aarwitz/tapp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "aarwitz-tapp": {
      "command": "npx",
      "args": [
        "-y",
        "@aarwitz/tapp"
      ]
    }
  }
}

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 @aarwitz/tapp - published under the repo owner's npm scope (@aarwitz)

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

03 · What Tapp can do

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

Latest releases

v0.17.8 · 2026-09-14

Native exploration honesty. ⚠️ Behavior change for iOS exploration. · Credential surfaces are catalogue-only without credentials (parity with web): with no testEmail/testPassword, iOS exploration records a login/signup…

v0.17.7 · 2026-09-13

Comparable evidence - gate policy v4. ⚠️ Behavior change for web gates. · outbound_unavailable now gates: promoted to medium severity and the deterministic tier. Since 0.17.6 the outbound audit renders each link in the…

v0.17.6 · 2026-09-11

The gate tells the truth - policy v3. ⚠️ Behavior change for web gates. · Web targets default to --fail-on medium: any deterministic finding at medium severity or above (broken links, missing anchors, unresolvable…

04 · Who maintains Tapp

tapp is maintained by aarwitz. It's the only MCP server we track from this author; the repo dates to Jul 2026.

05 · Facts

repository: github.com/aarwitz/tapp
category: browser automation - ranked #45 of 255 actively-maintained browser automation servers as of 2026-09-18.
release cadence: 9 releases in the last 90 days (latest 2026-09-14)
registry: io.github.aarwitz/tapp (active, first published 2026-07-20 · 15 versions)
packages: npm:@aarwitz/tapp

06 · Tapp FAQ

What is Tapp?

Is Tapp still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-14 and it shipped 9 releases in the last 90 days. We re-verify nightly.

How do I install Tapp?

Run `npx -y @aarwitz/tapp`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does Tapp 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 Tapp

Alternatives to Tapp

Maintained browser automation servers if Tapp isn't the fit.

Pairs well with

Servers that cover what Tapp doesn't - only shown when the pairing reason fits the companion.

More browser automation MCP servers · Sniff · Safari MCP · Mac Control MCP · Agent Browser · Aethyn Browser MCP

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