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

# Introduction

Paykassma is a service designed for secure money transfers between the Client of the service and the Users of the Client’s resource. We do not store or process users’ personal data, which keeps your integration narrow and your users safe.

### Key advantages

* P2C and P2P payment acceptance with no holds or rolling reserves.
* No chargebacks — a finalized payment is final.
* Connect any vertical: e-commerce, edtech, subscription services, marketplaces and more.
* Instant crediting and a transparent end-user transfer flow.
* Multilingual technical support 24/7.

### Glossary

* **Order** — a request that initiates a credit (deposit) of funds.
* **Client API** — the API methods through which the Client interacts with Paykassma to process payments.
* **Payment** — an operation that changes the balance of the Client’s payment account.
* **Payment method** — an identifier defining a specific way to transfer funds.
* **Payment page** — the form used to accept and process a payment.
* **Postback** — a server-to-server notification about operations performed on an order.

### Getting access

To obtain credentials for the sandbox or production environment, contact our support team. After onboarding, you will receive a `project_id`, `client_id`, `api_key` and `postback_key`.

### Jump right in

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h4><i class="fa-rocket">:rocket:</i></h4></td><td><strong>Quickstart</strong></td><td>Make your first signed test payment in under ten minutes.</td><td></td><td></td><td><a href="/documentation/guides/quickstart.md">Quickstart</a></td></tr></tbody></table>