# Shift4 Payment Platform API > Shift4 Payment Platform REST API. ## Table of contents - [Converting From Legacy Interfaces](https://docs.shift4.com/guides/converting-from-legacy-interfaces.md) - [Postman Collection](https://docs.shift4.com/tools/postman.md) - [Split-Tender Transactions](https://docs.shift4.com/guides/advanced-concepts/split-tender-transactions.md) - [CLAUDE.md](https://docs.shift4.com/claude.md) - [Level 2 Purchasing Card Data](https://docs.shift4.com/guides/advanced-concepts/level-2-purchasing-card-data.md) - [Shift4 Tools](https://docs.shift4.com/tools.md) - [Shift4 API Guides](https://docs.shift4.com/guides.md) - [Quick Start](https://docs.shift4.com/guides/quickstart.md) - [Changelog](https://docs.shift4.com/changelog.md) - [Overview](https://docs.shift4.com/sdks/dotnet.md) - [Overview](https://docs.shift4.com/sdks/ios.md) - [3D Secure](https://docs.shift4.com/guides/advanced-concepts/3d-secure.md) - [Card On File transactions](https://docs.shift4.com/guides/advanced-concepts/card-on-file-transactions.md) - [Overview](https://docs.shift4.com/sdks/java.md) - [Offline Processing](https://docs.shift4.com/guides/advanced-concepts/offline-processing.md) - [Partial Approval](https://docs.shift4.com/guides/advanced-concepts/partial-approval.md) - [Preventing Double Charges On Amended Transactions](https://docs.shift4.com/guides/advanced-concepts/preventing-double-charges-on-amended-transactions.md) - [Surcharging](https://docs.shift4.com/guides/advanced-concepts/surcharging.md) - [Dynamic Currency Conversion (DCC)](https://docs.shift4.com/guides/advanced-concepts/dynamic-currency-conversion.md) - [Tax-Free Shopping](https://docs.shift4.com/guides/advanced-concepts/tax-free-shopping.md) - [ACH](https://docs.shift4.com/guides/alternative-payments/ach.md) - [Citcon, WeChat Pay, Alipay](https://docs.shift4.com/guides/alternative-payments/citcon-wechat-alipay.md) - [Shift4 Alternative Payment Methods](https://docs.shift4.com/guides/alternative-payments.md) - [PayPal](https://docs.shift4.com/guides/alternative-payments/paypal.md) - [3D Secure Test Triggers](https://docs.shift4.com/guides/appendices/3d-secure-test-triggers.md) - [API Options](https://docs.shift4.com/guides/appendices/api-options.md) - [Card Level Results](https://docs.shift4.com/guides/appendices/card-level-results.md) - [Currency codes](https://docs.shift4.com/guides/appendices/currency-codes.md) - [Error codes](https://docs.shift4.com/guides/appendices/error-codes.md) - [Test Card Numbers](https://docs.shift4.com/guides/appendices/test-card-numbers.md) - [Test Server Triggers](https://docs.shift4.com/guides/appendices/test-server-triggers.md) - [Capturing Sales](https://docs.shift4.com/guides/core-concepts/capturing-sales.md) - [P2PE Format](https://docs.shift4.com/guides/core-concepts/p2pe-format.md) - [Printing Receipts](https://docs.shift4.com/guides/core-concepts/printing-receipts.md) - [Processing Refunds](https://docs.shift4.com/guides/core-concepts/processing-refunds.md) - [Restaurant Authorization And Settlement Flow](https://docs.shift4.com/guides/core-concepts/restaurant-authorization-and-settlement-flow.md) - [Understanding Card Tokens](https://docs.shift4.com/guides/core-concepts/understanding-card-tokens.md) - [Understanding Invoices](https://docs.shift4.com/guides/core-concepts/understanding-invoices.md) - [Using The Notes Field](https://docs.shift4.com/guides/core-concepts/using-the-notes-field.md) - [Legacy Card Tokens](https://docs.shift4.com/guides/deprecated/legacy-card-tokens.md) - [Commerce Engine](https://docs.shift4.com/guides/device-functionality/commerce-engine.md) - [Required EMV Authorization Request Tags](https://docs.shift4.com/guides/device-functionality/emv-tags-for-utgless-devices.md) - [NFC/Contactless Payments](https://docs.shift4.com/guides/device-functionality/nfc-contactless-payments.md) - [UTG Controlled Devices](https://docs.shift4.com/guides/device-functionality/utg-controlled-devices.md) - [Handling Referral Responses](https://docs.shift4.com/guides/response-handling/handling-referral-responses.md) - [Timeouts And Communication Failures](https://docs.shift4.com/guides/response-handling/timeouts-and-communications-failures.md) - [Transaction Flow](https://docs.shift4.com/guides/response-handling/transaction-flow.md) - [Understanding AVS and CSC Verification](https://docs.shift4.com/guides/response-handling/understanding-avs-and-csc-verification.md) - [Support](https://docs.shift4.com/guides/support.md) - [How it works](https://docs.shift4.com/guides/core-concepts/payment-links/how-it-works.md) - [Payment Links](https://docs.shift4.com/guides/core-concepts/payment-links.md) - [Troubleshooting & FAQ](https://docs.shift4.com/guides/core-concepts/payment-links/troubleshooting-and-faq.md) - [Use-case playbooks](https://docs.shift4.com/guides/core-concepts/payment-links/use-case-playbooks.md) - [API quickstart](https://docs.shift4.com/guides/core-concepts/payment-links/get-started/api.md) - [Customer Hub quickstart](https://docs.shift4.com/guides/core-concepts/payment-links/get-started.md) - [Create a fixed-amount link](https://docs.shift4.com/guides/core-concepts/payment-links/guides/create-link/api.md) - [Create a fixed-amount link](https://docs.shift4.com/guides/core-concepts/payment-links/guides/create-link.md) - [Post payment behaviour](https://docs.shift4.com/guides/core-concepts/payment-links/guides/customise-and-configure/api.md) - [Post payment behaviour](https://docs.shift4.com/guides/core-concepts/payment-links/guides/customise-and-configure.md) - [Understand statuses and track payments](https://docs.shift4.com/guides/core-concepts/payment-links/guides/monitor-and-reconcile/api.md) - [Get the payment link URL](https://docs.shift4.com/guides/core-concepts/payment-links/guides/share/api.md) - [Understand statuses and track charges](https://docs.shift4.com/guides/core-concepts/payment-links/guides/monitor-and-reconcile.md) - [Get the payment link URL](https://docs.shift4.com/guides/core-concepts/payment-links/guides/share.md) - [Shift4 Payment API](https://docs.shift4.com/apis/payments-platform-rest/openapi.md)