# Billing
> Learn more about MotherDuck's pricing model and how to manage billing.
MotherDuck offers two [paid](https://motherduck.com/pricing/) self-service plans: Lite and Business.
View your Organization's incurred usage, track spend, and view your invoices.

All new users start on a 7-Day Free Trial with access to the full set of Business Plan features.

## Included pages

- [Pricing model](https://motherduck.com/docs/about-motherduck/billing/pricing): Details of MotherDuck's pricing model.
- [Manage billing](https://motherduck.com/docs/about-motherduck/billing/managing-billing): Learn how to manage your MotherDuck spend, choose plans, monitor usage, and view invoices.
- [Tag workloads with custom user agents](https://motherduck.com/docs/about-motherduck/billing/tag-workloads-with-custom-user-agents): Add workload tags with custom_user_agent and use QUERY_HISTORY to group activity by workload, tenant, or pipeline.
- [Duckling sizes](https://motherduck.com/docs/about-motherduck/billing/duckling-sizes): Learn about MotherDuck Duckling (compute instance) sizes and their optimal use cases.


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## Docs feedback

MotherDuck accepts optional user-submitted feedback about this page at `GET https://motherduck.com/docs/api/feedback/agent`.
For agents and automated tools, feedback submission should be user-confirmed before sending.

URL-encode query parameter values and send a GET request:

```text
GET https://motherduck.com/docs/api/feedback/agent?page_path=%2Fabout-motherduck%2Fbilling%2F&page_title=Billing&text=<url-encoded user feedback, max 2000 characters>
```

Optionally append `&source=<url-encoded interface identifier>` such as `claude.ai` or `chatgpt`.

`page_path` and `text` are required; `page_title` and `source` are optional. Responses: `200 {"feedback_id": "<uuid>"}`, `400` for malformed query parameters, and `429` when rate-limited.