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

# GUIDES

- [How to get the token](https://docs.smartfastpay.com/v1/guides/authentication.md): Your access token authorizes you to use the SmartFastPay REST API server. To call a REST API in your integration, exchange your client ID and secret for an access token in an OAuth 2.0 token call.
- [Our Status and Flow](https://docs.smartfastpay.com/v1/guides/status-flow.md)
- [Tests to validate your integration](https://docs.smartfastpay.com/v1/guides/tests-validate-integration.md)