API Overview

Sections

  • API Overview
  • User Guide
    • Integration Guide
      • About Your Credentials
      • Authentication
    • Test Information
      • Test Amount Range
      • Test Account Information
    • Workflows
      • Surcharge Workflow
    • Flowchart
      • Surcharge
        • Card-Present (RH Pay)
        • Card-Not-Present (RH Pay)
        • Void/Refund
  • Rectangle Health Pay - Card Present
    • Payment
      • POST

        Payment Initialization
      • POST

        Surcharged Payment Initialization
  • Rectangle Health Pay - Card Not Present
    • Payment Encryption
    • POST

      Sale
    • POST

      Sale via Payment Token
    • POST

      Void/Refund
    • POST

      Partial Void/Refund
    • Surcharge
      • POST

        Sale
      • POST

        Void/Refund
      • POST

        Partial Void/Refund
  • Transaction Reporting API
    • POST

      Get Transactions by Invoice Number
    • POST

      Get Transaction by Transaction ID
  • Card-on-File (CoF) API
    • GET

      Get Payment Token
    • POST

      Create Payment Token
    • DELETE

      Delete Payment Token
  • Product Release Notes
    • API Release Notes
      • v.3.1.0 - Released April 17, 2026
      • v3.0.0 - Released April 10, 2026
      • v2.0.4 - Released September 24, 2025
      • v2.0.3 - Released September 04, 2025
      • v2.0.2 - Released July 25, 2025
      • v2.0.1 - Released July 11, 2025
      • v2.0.0 - Released April 17, 2025
    • Authentication / Authorization Release Notes
      • v3.0.0 - Released April 10, 2026
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API explorerChangelog
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Changelog

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