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

# Business use cases

> Learn how to build common use cases using our Business API

This section showcases common use cases built with our Business API. Each guide walks through the full request sequence: which endpoints to call, in what order, and what to watch out for.

> [!NOTE]
>
> You need a working authentication to follow these guides. Visit the [Authentication](https://docs.qonto.com/api-reference/business-api/introduction/authentication/methods.md) section to get started.

> [!NOTE]
>
> All code examples target the **Production** environment (`https://thirdparty.qonto.com/v2`). To run them against the Sandbox, use the [Sandbox base URL](https://docs.qonto.com/api-reference/business-api/introduction/base-urls.md) and include the `X-Qonto-Staging-Token` header — see [Accessing the Sandbox environment](https://docs.qonto.com/guides/developer-portal/sandbox-access.md).

> **[Send a SEPA transfer to a trusted beneficiary](https://docs.qonto.com/guides/use-cases/send-sepa-transfer.md)**
>
> List beneficiaries, verify the payee (VoP), and submit a transfer.

> **[Sync client invoices and attachments](https://docs.qonto.com/guides/use-cases/sync-client-invoices.md)**
>
> Keep client invoices and their attachments in sync with Qonto.

> **[Sync supplier invoices and attachments](https://docs.qonto.com/guides/use-cases/sync-supplier-invoices.md)**
>
> Pull supplier invoices and attachments into your system.

> **[Bulk upload supplier invoices](https://docs.qonto.com/guides/use-cases/bulk-upload-supplier-invoices.md)**
>
> Upload supplier invoices in bulk to speed up onboarding.

> **[Generate and download a Factur-X invoice](https://docs.qonto.com/guides/use-cases/generate-factur-x-invoice.md)**
>
> Create a compliant Factur-X invoice and download the PDF.

> **[Sync transactions and attachments](https://docs.qonto.com/guides/use-cases/sync-transactions.md)**
>
> Keep transactions and their attachments in sync with Qonto.

> [!TIP]
>
> Testing in the Sandbox? See [Testing in the Sandbox](https://docs.qonto.com/guides/authentication/oauth-sandbox.md) and [How to enable SDD Collections in the Sandbox](https://docs.qonto.com/guides/sandbox/enable-sdd-collections.md).

> [!NOTE]
>
> **Looking for AFNOR XP Z12-013?** See [E-invoicing via API](https://docs.qonto.com/guides/invoicing/e-invoicing.md) for how Qonto's API handles e-invoicing today.