qa

The CLI for Mo, Momentic's autonomous QA agent.

$ npm i qa

Point Mo at a URL. It explores the app in a real browser, writes its own test cases, and files one report: a verdict per case, plus reproduction steps and a recording for every bug it reproduces.

qa start "test https://your-app.com"

momentic.ai/mo

Requires Node 22.12+ or 24+ and a Momentic account (qa login). Mo is in beta. Sign up to get onboarded.

Using a coding agent? qa skills installs Momentic's agent skills and MCP servers for it.

Install

Install the CLI globally:

npm install -g qa
qa --help

Or run it without a global install:

npx qa --help

The npm package is qa. It installs a compiled qa binary for your system and exposes the qa command. The standalone installer (curl -fsSL https://cli.momentic.ai/qa | sh) also installs qa. Releases before 0.18 named the command mo.

The npm launcher requires Node.js 22.12 or later in the 22.x series, or Node.js 24 or later. Binaries are available for macOS ARM64/x64, Linux ARM64/x64 (glibc and musl), and Windows x64. Linux musl requires libstdc++. Keep optional dependencies enabled so npm can install your system's binary.

Authentication

Sign in once to share credentials with the Momentic CLIs:

qa login
qa logout

Credentials are saved to ~/.momentic/auth.json. Existing credentials from momentic login or momentic-wizard login are reused automatically. You can also provide MOMENTIC_API_KEY or --api-key for a single command.

Update

Update a global npm installation with:

npm install -g qa@latest

For a project dependency, update qa with your project's package manager. qa upgrade prints these instructions without replacing npm-managed files.

Troubleshoot

Run qa doctor to print the install method, resolved binary path, every mo/qa/momentic executable on your PATH, and the one that wins. Include the output when reporting a CLI problem.

• npm install -g qa fails with EEXIST if a file named qa already exists in npm's global bin directory. Check ls -la $(npm prefix -g)/bin and remove the stale entry; do not pass --force.
• qa 0.17.x also installed a mo command. Updating removes it.
• A curl install from before the rename left mo at $HOME/.local/bin/mo. mo upgrade still downloads new releases, but the file keeps the mo name. Remove it and rerun the installer to switch to qa.
• If a standalone mo and the npm package coexist, the first on PATH runs. In a shell that already ran the old command, run hash -r to clear the cached path.
• npx mo is not Momentic; the mo package on npm is a different project. Use npx qa.

See the Mo CLI reference for commands and examples.