> For the complete documentation index, see [llms.txt](https://api-docs.fcfpay.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://api-docs.fcfpay.com/reference/api-requests-v1-deprecated.md).

# API Requests - V1 - deprecated!

## Environments

The following environments are available:

| Environment | Merchant URL | Checkout URL                          |
| ----------- | ------------ | ------------------------------------- |
| Sandbox     | ---------    | <https://checkout-sandbox.fcfpay.com> |
| Production  | ---------    | <https://checkout.fcfpay.com>         |

For easy integration, you may access Postman documentation and clone the collection: <https://documenter.getpostman.com/view/20701275/UyrEhaiN>

You can then add a new environment for Sanbox, if needed.

{% hint style="info" %}
All the API endpoints in the documentation containing the Production environment URL, so for testing you can use the Sandbox.

To use sandbox, you must create an account at <https://sandbox.fcfpay.com/register> and se the appropriate testnet for each token.
{% endhint %}

## Create Order

{% content-ref url="/pages/H3XR6AnRHMrqoqxEsUY2" %}
[Create Order](/reference/api-requests-v1-deprecated/create-order.md)
{% endcontent-ref %}

## Deposit Callback

{% content-ref url="/pages/UdGVkyTssetfQXaabZEw" %}
[Deposit Callback](/reference/api-requests-v1-deprecated/deposit-callback.md)
{% endcontent-ref %}

## Check Source

{% content-ref url="/pages/IM7H1ZYJgbe2HR73JC7w" %}
[Check Source](/reference/api-requests-v1-deprecated/check-source.md)
{% endcontent-ref %}