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

# Purchase express

> Create a purchase order for a supplier in a single call.

Purchase express creates a purchase order for a supplier in one call. The API also accepts a nested purchase invoice and payment, but their fields are not documented yet. This area has 1 endpoint, available in all seven SDKs.

## At a glance

| Endpoint | Method | Path | What it does |
| - | - | - | - |
| [Create an express purchase order](https://exsited.mintlify.site/api-reference/purchase-express/create-an-express-purchase-order.md) | POST | `/purchase_express` | Creates a purchase order for a supplier in one call and returns it under `purchase_express`. |

## Before you call

Register your API credentials once when your app starts, as shown in
[Authentication](https://exsited.mintlify.site/authentication.md). Every SDK sample on these pages then gets its client in one line.
With cURL, send the access token in an `Authorization` header: `Authorization: Bearer $ACCESS_TOKEN`.

## Things to know

* **The body is wrapped in `account`.** The supplier goes in `account.id` and the order in `account.purchase_order`.
* **Without a nested purchase invoice, nothing is billed or paid.** Only the purchase order is created.
* **The new purchase order comes back under `purchase_express`.** Read or manage it afterwards through the purchase order endpoints.


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