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

# Overview

**Rocketfuel PayIns API Overview**

1. #### **Sign Up**

   Merchants begin by signing up with Rocketfuel. They must provide basic business and personal information to create an account.
2. **KYB (Know Your Business)**

   The KYB process verifies a merchant's legal and financial standing. This includes submitting company documentation to ensure compliance with regulatory standards.
3. **Approval**

   After KYB verification, Rocketfuel reviews the submitted documents. Once approved, the merchant receives authorization to use the platform for transactions.
4. **Keys Generation**

   After approval, the merchant generates their public and private keys. These keys are essential for securing API communications and handling transactions securely.
5. **Ready to Use APIs**

   Once set up, merchants gain access to Rocketfuel’s PayIns APIs, allowing them to integrate payment processing into their platform and start accepting transactions seamlessly.

   * **RKFL Widget/Payment Page**
     * **Redirect**: Merchants can redirect customers to a pre-built Rocketfuel payment page. This simplifies the payment process without needing custom development.
     * **RKFL Widget**: A customizable payment widget that can be embedded directly into a merchant’s website, allowing customers to complete transactions seamlessly within the site.
   * **Custom User Interface**\
     For businesses seeking full control over the payment experience, Rocketfuel offers APIs to build a custom interface.

***

For detailed information, refer to each section under PayIns.