> For the complete documentation index, see [llms.txt](https://docs.payrexx.com/developer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payrexx.com/developer/guides/gateway.md).

# Accept Payment

To accept payments, the Payment Gateway through the Payrexx API is the most customizable integration option.

## Requirements

Before you start developing you need a few things...

* Payrexx account: Signup [here](https://signup.payrexx.com)
* A fully set up payment provider which fits your needs: [PSP Features](https://docs.payrexx.com/merchant/bezahldienste/funktionsmatrix)
* API credentials: Find them in your Payrexx account under **API & Integration**

**Recommendation**

* Use our [Payrexx PHP SDK](https://github.com/payrexx/payrexx-php) If you are developing in PHP

## Process - Gateway

The following diagram shows the payment process.

<figure><img src="/files/XYlxwQGTRwuYfWOdGTIU" alt=""><figcaption></figcaption></figure>

### Preparation

First you have to choose one of the available payment types.\
This will be needed once you start building your Gateway

{% content-ref url="/pages/-MdGn8FMtZ5jIgykxS\_l" %}
[Payment Types](/developer/guides/gateway/payment-types.md)
{% endcontent-ref %}

{% hint style="info" %}
If you want to make **one-time** payments, you can **skip this step**.\
Because one-time is the default type.
{% endhint %}

### Start Building

Finally! You can now start developing.

Detailed process description from the Gateway creation until after payment completion:

{% content-ref url="/pages/-Mguz7bjqS3lWfKhQ2HU" %}
[Build Your Gateway](/developer/guides/gateway/build.md)
{% endcontent-ref %}

## Next Steps

### Receive Transaction Data - Webhook

All about the Payrexx Webhook:

{% content-ref url="/pages/-MdGx\_nhlsSbarsBjmzN" %}
[Webhook](/developer/guides/webhook.md)
{% endcontent-ref %}

Shape and content of your transaction or subscription Webhook:

{% content-ref url="/pages/-MdH-49ly2WkM5gq1xze" %}
[Broken mention](broken://pages/-MdH-49ly2WkM5gq1xze)
{% endcontent-ref %}

{% content-ref url="/pages/-MdH-TXLfrfkE83U3pAR" %}
[Broken mention](broken://pages/-MdH-TXLfrfkE83U3pAR)
{% endcontent-ref %}