> For the complete documentation index, see [llms.txt](https://dev.simplepay.ai/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.simplepay.ai/docs/api-documentation/overview.md).

# Overview

## **API Versions**

Different endpoints support different API versions specified via the `v` query parameter:

* [**Invoices API: v2**](/docs/javascript-sdk/services/invoice.md)
* [**Transactions API: v1**](/docs/api-documentation/transactions.md)
* [**Products API: v1**](/docs/api-documentation/products.md)
* [**Currencies and Netwroks API: v1**](/docs/api-documentation/assets.md)

### Swagger API Refference

{% embed url="<https://swagger-flame.vercel.app/>" %}

Import to Postman collection:

{% file src="/files/SApvG9srFf5MWD8SciPZ" %}