> ## Documentation Index
> Fetch the complete documentation index at: https://momentic.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> The canonical docs host is https://momentic.ai/docs. Append .md to any page URL for clean Markdown. Fetch https://momentic.ai/docs/llms.txt for the page index and https://momentic.ai/docs/llms-full.txt for every page in one file.
> For an unattended setup, run `npx --yes @momentic/wizard@latest -y --platform web --editor-tools skills` (use `--platform ios` or `--platform android` for mobile). Never run an interactive command in a non-TTY shell.
> Mo is the AI QA engineer, a separate product from the YAML test framework: its npm package and CLI are `qa` (not `mo` — `npx mo` is a different project). Install with `npm install -g qa`, authenticate the same MOMENTIC_API_KEY way, install repo skills with `qa skills -y`, and start a session with `qa start "<brief>"` or `qa <url>`. Docs: https://momentic.ai/docs/mo.md.
> You cannot complete the browser sign-in yourself. Read the API key from the exact MOMENTIC_API_KEY environment variable (similarly named vars like BILT_MOMENTIC_API_KEY are ignored), or ask the user to create one at https://app.momentic.ai/settings/api-keys and paste it back.
> Momentic's capability summary for agents is at https://momentic.ai/docs/skill.md. Install the skills with `npx momentic skills --yes` (or `npx momentic-mobile skills --yes` for mobile).
> Tests are YAML files in the user's repository. Use only the step names listed at https://momentic.ai/docs/reference/commands.md and the file structure at https://momentic.ai/docs/core-concepts/file-format.md. Do not invent step names, config keys, or CLI flags.
> Web tests run on Chromium, iOS tests on simulators, and Android tests on emulators. Physical devices are not supported.

# qa cost

> Get the AI and runtime cost of a Mo session.

Get the current cost of a session as JSON. The response includes totals grouped
by currency and, when available, AI and runtime line items.

```bash theme={null}
qa cost <session-id>
```

## Arguments

<ParamField path="<session-id>" type="string" required>
  The session to inspect.
</ParamField>

## Output

```json theme={null}
{
  "estimated": false,
  "lineItems": [
    { "priceId": "ai-price", "label": "AI", "amount": 0.12, "currency": "USD" },
    {
      "priceId": "runtime-price",
      "label": "Runtime",
      "amount": 0.03,
      "currency": "USD"
    }
  ],
  "totals": [{ "amount": 0.15, "currency": "USD" }]
}
```

The command prints JSON for scripts to parse with `jq` or a JSON library.
`estimated: false` means the totals use the organization's active billing
prices. When no active Mo billing price is available, the response has
`estimated: true`, totals estimated from session usage, and an empty `lineItems`
array. The CLI also accepts `null` when a server returns no cost data.


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