# Reference - [Integration Tutorial](https://dev.fatpay.org/reference/integration-tutorial.md) - [On-ramp Widget Customization](https://dev.fatpay.org/reference/integration-tutorial/on-ramp-widget-customization.md) - [NFT Checkout Widget Customization](https://dev.fatpay.org/reference/integration-tutorial/nft-checkout-widget-customization.md) - [Interface Customization](https://dev.fatpay.org/reference/integration-tutorial/interface-customization.md) - [Widget Themes Gallery](https://dev.fatpay.org/reference/integration-tutorial/widget-themes-gallery.md) - [Widget Signature](https://dev.fatpay.org/reference/integration-tutorial/widget-signature.md) - [API Reference](https://dev.fatpay.org/reference/api-reference.md) - [APIs](https://dev.fatpay.org/reference/api-reference/apis.md) - [List all cryptocurrencies](https://dev.fatpay.org/reference/api-reference/apis/list-all-cryptocurrencies.md): List all the fiat currencies supported by FaTPay - [List all fiat currencies and payment methods](https://dev.fatpay.org/reference/api-reference/apis/list-all-fiat-currencies-and-payment-methods.md): List all the fiat currencies and its' payment methods supported by FaTPay - [Retrieve quoted price](https://dev.fatpay.org/reference/api-reference/apis/retrieve-quoted-price.md): Query cryptocurrency quotes based on fiat currency amount and present exchange rate - [List all orders](https://dev.fatpay.org/reference/api-reference/apis/list-all-orders.md): Query orders list - [Webhooks](https://dev.fatpay.org/reference/api-reference/webhooks.md) - [Webhook for order events](https://dev.fatpay.org/reference/api-reference/webhooks/webhook-for-order-events.md): Webhook notification will be sent by FaTPay to the partner when the order status is changed - [API Signature & Webhook Validation](https://dev.fatpay.org/reference/api-reference/verification.md): Wish you safe and sound... --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://dev.fatpay.org/reference.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.