# NACE Billing Documentation

## Docs

- [Disputes](https://billing-help.nace.ai/billing/disputes.md): How disputes are handled
- [Invoice types](https://billing-help.nace.ai/billing/invoice-types.md): Client invoices vs provider payouts
- [How to use NAPA](https://billing-help.nace.ai/billing/napa.md): The NAPA process: from contract and timesheet to invoice
- [Billing overview](https://billing-help.nace.ai/billing/overview.md): What NAPA is and why we use it
- [Environments](https://billing-help.nace.ai/frontend/environments.md): Test, Demo, and Production — when to use which
- [Billing app overview](https://billing-help.nace.ai/frontend/overview.md): What the Billing app is and what you use it for
- [Using the Billing app](https://billing-help.nace.ai/frontend/using-the-app.md): How to log in, upload documents, and review or approve invoices
- [How to use this documentation](https://billing-help.nace.ai/getting-started.md): How to find what you need in the Billing docs
- [Contacts and support](https://billing-help.nace.ai/help/contacts.md): Who to contact for access, technical issues, or questions
- [Welcome](https://billing-help.nace.ai/index.md): Billing team guide to NAPA and the Billing app

## OpenAPI Specs

- [openapi](https://billing-help.nace.ai/api-reference/openapi.json)

## Optional

- [Mintlify Docs](https://mintlify.com/docs)