> For the complete documentation index, see [llms.txt](https://docs.payengine.co/developer-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payengine.co/developer-docs/processing-payments.md).

# Processing Payments

- [Introduction](https://docs.payengine.co/developer-docs/processing-payments/introduction.md)
- [Transaction Flow and Status](https://docs.payengine.co/developer-docs/processing-payments/introduction/transaction-flow-and-status.md)
- [SecureFields JS](https://docs.payengine.co/developer-docs/processing-payments/secure-fields.md)
- [SecureFields Bank Account](https://docs.payengine.co/developer-docs/processing-payments/secure-fields/securefields-bank-account.md)
- [Using tokens](https://docs.payengine.co/developer-docs/processing-payments/secure-fields/using-tokens.md)
- [Credit Card Form](https://docs.payengine.co/developer-docs/processing-payments/credit-card-form.md)
- [Connect with Plaid](https://docs.payengine.co/developer-docs/processing-payments/connect-with-plaid.md)
- [Connect Mailgun](https://docs.payengine.co/developer-docs/processing-payments/connect-mailgun.md)
- [3D Secure](https://docs.payengine.co/developer-docs/processing-payments/3d-secure.md)
- [Payments API](https://docs.payengine.co/developer-docs/processing-payments/payments-api.md)
- [Searching Transactions](https://docs.payengine.co/developer-docs/processing-payments/searching-transactions.md)
- [Registering a cloud connected device](https://docs.payengine.co/developer-docs/processing-payments/registering-a-cloud-connected-device.md): This guide provides step by step instructions to activate cloud connected payment devices
- [Apple Pay](https://docs.payengine.co/developer-docs/processing-payments/apple-pay.md)
- [Apple Pay in your native app](https://docs.payengine.co/developer-docs/processing-payments/apple-pay/apple-pay-in-your-native-app.md)
- [Google Pay™](https://docs.payengine.co/developer-docs/processing-payments/google-pay-tm.md)
- [PayPal™](https://docs.payengine.co/developer-docs/processing-payments/paypal.md)
- [Level 2 and Level 3 Data](https://docs.payengine.co/developer-docs/processing-payments/level2.md): The more data you pass with a commercial transaction, the lower the interchange fees that apply to that transaction.
- [Fraud Prevention](https://docs.payengine.co/developer-docs/processing-payments/fraud-prevention.md)
- [Reporting](https://docs.payengine.co/developer-docs/processing-payments/reporting.md): The reporting options below are designed to supply crucial data and analytics, enabling you to strategically optimize your operations and enhance your partnership with us.
- [PCI Compliance](https://docs.payengine.co/developer-docs/processing-payments/pci-compliance.md): A note on PCI Compliance for merchants
- [Address Verification Service (AVS) Check](https://docs.payengine.co/developer-docs/processing-payments/address-verification-service-avs-check.md)
- [Hosted Payments](https://docs.payengine.co/developer-docs/processing-payments/hosted-payments.md)
- [Embedded Payments Session Integration](https://docs.payengine.co/developer-docs/processing-payments/hosted-payments/embedded-payments-session-integration.md)
- [Tap to Pay](https://docs.payengine.co/developer-docs/processing-payments/tap-to-pay.md)


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