Tapp

Name: Tapp
Author: aarwitz

by aarwitzversion 0.35.1i★ –iRuns on your computer

Registry nameio.github.aarwitz/tapp

Install

Overview

Description from the maker (original English)

Test iOS, Android, and web apps with agent exploration, replayable flows, and CI gates.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

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

Run this in your terminal

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

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account aarwitz, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32545 servers in this category
Published to the registry more recently than 86% of the other 32545 servers in this category
Basic checks equal to or better than 100% of the other 32545 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Tapp safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.35.1) reached the registry 5 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Python MCP

Alternatives

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Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Tapp

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.

Exploration reports findings, coverage, evidence, and limits. Only the repository-connected gate returns pass, fail, or inconclusive. Tapp does not turn an autonomous crawl into a subjective "ship-ready" score.

Real evidence, not a mock: this public DemoApp run reached the requested iOS surface in three observed route actions. Watch 45 seconds of autonomous exploration or inspect a complete sanitized web evidence report.

Supported targets:

Target app	Runtime
iOS	Simulator on macOS with Xcode; driven through XCUITest and accessibility
Android	Connected emulator or device with `adb`; driven through UIAutomator
Web	Owned browser app in Playwright Chromium
macOS desktop	Any `.app` on a Mac, driven through the Accessibility API; needs the Accessibility permission (`tapp doctor` says how)
Windows desktop	WPF, WinForms, and WinUI apps through Windows UI Automation — early runs are set up through the pilot

Windows hosts Android and web testing when their prerequisites are installed, and is the home of the Windows desktop target.

Give Tapp to your coding agent

After setup, the whole user prompt is:

Use Tapp to test this app.

The official skill teaches the agent to choose the smallest useful operation, handle repositories with multiple app targets, inspect visual evidence, and keep exploration observations separate from gate decisions.

Claude Code, Codex, Cursor, Copilot, and other Agent Skills clients (recommended):

npx -y skills add aarwitz/tapp --skill tapp

This installs the open Agent Skills workflow into the current project and lets the agent run the npm CLI directly. Inspecting, focused evidence, autonomous exploration, deterministic replay, and gating need no MCP server, plugin, account, API key, global Tapp install, or pasted prompt block. Add -g for a user-wide install, or --agent claude-code, --agent codex, and similar selectors to constrain the clients. Start or restart the agent from the application repository and use the short prompt above.

Claude Code — optional enhanced skill and MCP tools:

claude plugin marketplace add aarwitz/tapp

claude plugin install tapp@tapp

The plugin bundles the same tapp Agent Skill with the matching npm-backed MCP server. Add it when you want inline screenshot results or when the agent must interactively tap, type, and record an arbitrary multi-step journey in one persistent session. It is not required for the core skill-to-CLI workflow.

A live site, production, or a site you do not own: the agent uses tapp explore --read-only / tapp_explore {readOnly:true}, which renders and reads the page but never clicks, types or submits. Exploration is for apps and environments you own.

No agent integration: run the npm package directly from an app repository in one line:

npx -y @aarwitz/tapp@latest init . --explore

VS Code: install Tapp from the Marketplace. It contributes the same cross-platform Agent Skill to Copilot plus focused iOS simulator tools and an auto-refreshing screenshot preview. The preview is not an embedded Simulator or video stream. Android and web remain available through the skill's CLI/MCP workflow.

Teams: Tapp's core stays MIT licensed. A small paid founding pilot is open for hands-on repository onboarding, important-journey setup, and CI integration in infrastructure you control. Apply without sharing private data.

you:    "Add a logout button to the settings screen"

agent: *writes the Swift* agent: *tapp: finds Settings in source, follows its previously observed route, screenshots it* agent: "Done — and here it is working on the simulator: [screenshot]"

npm CLI quickstart

Requirements: Node ≥ 18. iOS needs macOS + Xcode; Android needs adb plus a connected emulator/device (and JDK 17 when Tapp builds source rather than installing an existing APK); web needs Playwright + Chromium. tapp doctor reports these separately.

From the app repository, ground Tapp once, then use the smallest operation for later checks:

npx -y @aarwitz/tapp@latest init . --explore # first run: detect/build, explore, and ground .tapp/ui-map.json

npx -y @aarwitz/tapp@latest look # one current screen + screenshot npx -y @aarwitz/tapp@latest explore --goal "Save storefront settings visible above keyboard" # source + observed-route fast path npx -y @aarwitz/tapp@latest explore # later broad exploration (observation, not a gate)

Source tells explore --goal where the requested UI likely lives; only a route already observed in .tapp/ui-map.json authorizes navigation. If a fresh repository has no such route yet, Tapp returns the source evidence instead of guessing through the app.

Claude Code can read the saved image with its file-reading tool; Codex can open it with view_image. The agent should report what the screenshot proves, relay the exploration findings as-is (an observation, not a merge decision — tapp ci gates that), and link the HTML evidence report. No Tapp server, account, global install, API key, or bundle id is required for this loop. The platform runtime still needs to be installed, and repository onboarding can write reviewed configuration under .tapp/.

The product, executable, and package leaf are all Tapp: npm distributes it as @aarwitz/tapp, while the installed command remains tapp.

To bootstrap maintained release infrastructure, preview the repository model and grounded plan before Tapp writes anything:

npx -y @aarwitz/tapp@latest init . --dry-run --json-out /tmp/tapp-init.json

Build/start the detected web target, ground the first UI Map, then stop it.

npx -y @aarwitz/tapp@latest init . --explore --platform web

Or build/install the detected Xcode target, ground the map, and persist the validated scheme.

npx -y @aarwitz/tapp@latest init . --explore --platform ios --target .

Or connect to an already-running owned URL:

npx -y @aarwitz/tapp@latest init . --explore --platform web --url http://127.0.0.1:4173

If the app has roles/accounts, bind names once; values stay in local/CI secrets.

npx -y @aarwitz/tapp@latest plan actor set alice . --role member --session isolated \ --credential email=ALICE_EMAIL --credential password=ALICE_PASSWORD

Review-only path: tapp init . → tapp plan show → tapp plan review --approve ...

After approved drafts replay and are promoted, establish the selected target's baseline

through the ordinary full gate, then generate the reviewable GitHub workflow.

npx -y @aarwitz/tapp@latest ci baseline . --platform web npx -y @aarwitz/tapp@latest ci install .

Actor setup refuses to overwrite an existing actor. Repeat actor set with --replace only when you intend to replace that actor's reviewed role, session, provisioning, or credential bindings.

In a repository containing multiple apps (for example, iOS plus web), tapp init . --explore without an explicit target does not guess from detection order—even when a prior choice is recorded. A human terminal gets a numbered selector; a non-interactive CLI prints exact target-selection commands, while MCP also returns structured choices. Neither builds or writes before the choice. After you choose one, the model retains every detected target and records the choice as the default for the next bare tapp explore; explicit init --explore continues to ask because it is the onboarding/refresh operation. Setup gaps belonging only to unselected targets are shown as informational, not as failures of the selected run.

The baseline command writes only after exploration and every selected deterministic suite pass conclusively. It stores .tapp/baselines/ / .json; the generated workflow uses that exact target identity so two apps on the same platform never share a baseline. ci install writes .github/workflows/tapp.yml plus .tapp/ci.json, refuses unresolved build configuration and existing-file collisions, and never commits, pushes, enables branch protection, or creates GitHub resources. Review and pin the generated Tapp release reference to its immutable commit SHA before production.

look and explore accept a repo directory, a path/to/App.app, a bundle id, or no target (auto-detecting the repository or installed app):

npx -y @aarwitz/tapp@latest look [target]         # launch the app → screen summary + screenshot file

npx -y @aarwitz/tapp@latest look [target] --tree # + the accessibility tree of the current screen npx -y @aarwitz/tapp@latest look # no target on iOS: the booted simulator as it is right now

On iOS, look --tree inspects an installed app and never builds, uninstalls, or replaces it. With no target, it uses the repository's recorded iOS target or the sole installed app. If the choice is ambiguous, it lists the installed apps for you to select. Pass a bundle id to inspect a specific sandbox build; run tapp_build (MCP) or init . --explore when you intend to replace it.

iOS Flow evidence includes flow-final.png on passing and failing replays, plus flow-failure-N.png at a failed step, alongside the log, JSON report, and XCTest result bundle.

Web: npx -y @aarwitz/tapp@latest explore http://localhost:3000 *(one-time setup: npm i -g playwright && npx playwright install chromium)*. Add --watch to open Tapp's controlled, isolated Chromium window and follow its clicks with an on-page pointer/action label. Tapp hides that watch UI from saved evidence screenshots and does not automate your personal/default browser profile.

Focused web inspection waits briefly for loading states to settle. If a consent or location modal blocks the screen, dismiss it and wait for the content you care about in the same package-only call:

npx -y @aarwitz/tapp@latest look https://example.com --tap "Not now" --wait-for "Dashboard"

npx -y @aarwitz/tapp@latest look https://example.com --tree --tap "Not now" --wait-for "Dashboard" --json

Android:

npx -y @aarwitz/tapp@latest explore path/to/app-debug.apk --platform andr

Only the beginning is shown; read the rest in the repo

Tapp

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Python MCP

README from the maker

Tapp

Give Tapp to your coding agent

npm CLI quickstart

Build/start the detected web target, ground the first UI Map, then stop it.

Or build/install the detected Xcode target, ground the map, and persist the validated scheme.

Or connect to an already-running owned URL:

If the app has roles/accounts, bind names once; values stay in local/CI secrets.

Review-only path: tapp init . → tapp plan show → tapp plan review --approve ...

After approved drafts replay and are promoted, establish the selected target's baseline

through the ordinary full gate, then generate the reviewable GitHub workflow.