> For the complete documentation index, see [llms.txt](https://support.ordereazi.com/central/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.ordereazi.com/central/developers/api-guides.md).

# API guides

Task guides for the OrderEazi API: orders, products and stock, clients, suppliers, projects and documents, Purchase Orders, shipments, and reference data.

The [API reference](/central/developers/finding-your-api-reference.md) lists every endpoint and field, but it doesn't tell you which endpoints to use together, or in what order. These guides walk through the common integration tasks, with the endpoints each one needs and the things to watch for.

### Before you start

Read [Getting started with the API](/central/developers/getting-started-with-the-api.md) first. Every guide assumes you send the `X-OrderEazi-Key` and `x-api-version: 2.0` headers, and know the [response envelope](/central/developers/responses-errors-and-warnings.md).

### The guides

| Guide                                                                                                            | Use it to                                                                                                      |
| ---------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------- |
| [Receiving orders from a sales channel](/central/developers/api-guides/receiving-orders-from-a-sales-channel.md) | Send orders from a shop or marketplace into OrderEazi, cancel them, and book their courier.                    |
| [Products and stock levels](/central/developers/api-guides/products-and-stock-levels.md)                         | Read products, prices, and stock, and load products, prices, and stock from your system.                       |
| [Clients and End Users](/central/developers/api-guides/clients-and-end-users.md)                                 | Keep clients, their addresses, and End Users in step with your CRM or accounting system.                       |
| [Suppliers](/central/developers/api-guides/suppliers.md)                                                         | Read suppliers, and create or update them from your accounting system.                                         |
| [Projects and documents](/central/developers/api-guides/projects-and-documents.md)                               | Find projects, read and add lines, create Tax Invoices, and send ERP numbers back from your accounting system. |
| [Purchase Orders](/central/developers/api-guides/purchase-orders.md)                                             | Create a Purchase Order, and receive stock against it.                                                         |
| [Shipments](/central/developers/api-guides/shipments.md)                                                         | Get courier quotes, and read and record shipments.                                                             |
| [Reference data](/central/developers/api-guides/reference-data.md)                                               | Read the lists other calls need, such as warehouses, branches, currencies, and sales channels.                 |

### Related pages

* [Finding your API reference](/central/developers/finding-your-api-reference.md): every endpoint and field
* [Webhooks](/central/developers/webhooks.md): have OrderEazi tell you when things change