> 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.md).

# PayIns

- [Overview](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/overview.md)
- [Rocketfuel payment solution workflow](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-payment-solution-workflow.md)
- [Encryption Algorithm](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/encryption-algorithm.md)
- [Public Key Based](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/encryption-algorithm/public-key-based.md)
- [Secret Key Based](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/encryption-algorithm/secret-key-based.md)
- [Authentication](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/authentication.md)
- [Authenticate a merchant](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/authentication/authenticate-a-merchant.md)
- [Authentication Without Email / Password](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/authentication/authentication-without-email-password.md)
- [RocketFuel UI Integration](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration.md)
- [Generate Invoice Link](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/generate-invoice-link.md)
- [Payment Processing](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/payment-processing.md)
- [RKFL Payment Page](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/payment-processing/rkfl-payment-page.md)
- [RKFL Payment Widget](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/payment-processing/rkfl-payment-widget.md)
- [Transaction Lookup](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/transaction-lookup.md)
- [Lookup using Auth](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/transaction-lookup/lookup-using-auth.md)
- [Lookup using Public Key](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/transaction-lookup/lookup-using-public-key.md)
- [Webhooks](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/webhooks.md)
- [Handling Partial Payments](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/handling-partial-payments.md)
- [Transaction  Statuses](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/rocketfuel-ui-integration/transaction-statuses.md)
- [Custom UI Integration](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/custom-ui-integration.md)
- [Cryptocurrencies listing](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/custom-ui-integration/cryptocurrencies-listing.md)
- [Generate QR Code](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/custom-ui-integration/generate-qr-code.md)
- [QR Payment Status](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/custom-ui-integration/qr-payment-status.md)
- [Transactions Lookup](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/custom-ui-integration/transactions-lookup.md)
- [Webhooks](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/custom-ui-integration/webhooks.md)
- [Handle Partial Payment](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/custom-ui-integration/handle-partial-payment.md)
- [Utility APIs](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis.md)
- [Subscriptions/Recurring Payments](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/subscriptions-recurring-payments.md)
- [Store info](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/store-info.md)
- [Shopper](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/shopper.md)
- [Shopper manual signup](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/shopper/shopper-manual-signup.md)
- [Verify shopper's email id](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/shopper/verify-shoppers-email-id.md)
- [Shopper manual login](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/shopper/shopper-manual-login.md)
- [Shopper info](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/shopper/shopper-info.md)
- [Shopper wallet balance](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/shopper/shopper-wallet-balance.md)
- [Exchange Payment](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/exchange-payment.md)
- [Exchanges listing](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/exchange-payment/exchanges-listing.md)
- [Pre-payment validation check](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/exchange-payment/pre-payment-validation-check.md)
- [Payable amount](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/exchange-payment/payable-amount.md)
- [Trigger Exchange payment](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/exchange-payment/trigger-exchange-payment.md)
- [Bank Payment](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/bank-payment.md)
- [Bank listing](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/bank-payment/bank-listing.md)
- [Bank payment](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/bank-payment/bank-payment.md)
- [Transaction listing](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/transaction-listing.md)
- [Order info](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/utility-apis/order-info.md)
- [Wallet payment](https://docs.rocketfuel.inc/developer-guides/api-reference/payins/wallet-payment.md)