Get Started
- Explore Payment Solutions
- Developer Docs MCP
- Get Your API Keys
- Third Party Integrations
- Classic API Migration Playbook
Design Toolkits for Developers
Online Payments
- Online Payments Overview
- Payment Component
- Customer Vault
- Recurring Transactions
- Hosted Checkout
- Custom Checkout
- Collect.js
In-Person Payments
- In-Person Payments Overview
- Enabling Test Mode
- Tap to Pay on iPhone
- Enable Tap to Pay
- Downloading the SDK
- Unboxing the iOS SDK
- Creating and Managing Security Keys
- Preparing for Development
- Firewall Configuration
- Transaction Flow
- Sequence Diagrams
- Modes of Operation
- Configuration
- Configuration and Utility Methods
- Configuration and Utility Events
- Start Transaction
- Transaction Events
- Receipts
- Supported Features
- User Experience Requirements
- Regional Requirements
- Preparing for Release
- Entitlement Review
- Frequently Asked Questions
- Tap to Pay on Android
- Enable Tap to Pay
- Downloading the Android SDK
- Unboxing the Android SDK
- Creating and Managing Security Keys
- Preparing for Development
- App Onboarding
- Firewall Configuration
- Transaction Flow
- Sequence Diagrams
- Modes of Operation
- Configuration
- Configuration and Utility Methods
- Configuration and Utility Events
- Start Transaction
- Transaction Events
- Receipts
- Supported Features
- Contactless Symbol Reproduction Requirements
- Frequently Asked Questions
- VP3350
- Unboxing your VP3350 device
- Enable Test Mode
- Downloading the Android/iOS SDK
- Unboxing the Android/iOS SDK
- Creating and Managing Security Keys
- Platform Specific Requirements
- Firewall Configuration
- Transaction Flow
- Configuration
- Configuration and Utility Methods
- Configuration and Utility Events
- Payment Methods
- Payment Events
- Deferred Authorizations
- Surcharging
- TMS Properties
- Receipts
- App Submission
- Appendix: Quick Reference Tables
- Axium SmartPOS
- Lane/Series
- Self/Series
- Test Card Simulator
- Device SDKs & APIs
- Direct Connect
Reporting
Extensions
Embedded Components
Online Checkout Flow
![[NMI Developer Documentation]](https://files.readme.io/363a377-small-68761c5a-7cb7-470a-87fd-f6dadcc1a28e.png){kind=link}
![[]](https://files.readme.io/54c3670617ca99a42cebf3018e8c5a6455a7651bc0ab8180546dc6d1d894b7a5-1_-_Guest_Checkout.png){kind=link}
![[]](https://files.readme.io/49462175155efb206854406f43863204deed67e59a1b7063e3d1631cdabe9238-2_-_Checkout.png){kind=link}
![[]](https://files.readme.io/55e6abe0a5f701183c806cd92ad20485ae7c5acc661262cc99cf7f7bab341c17-3_-_Secure_collection.png){kind=link}
![[]](https://files.readme.io/1e3a9fd5e07fa36d0c919b49d18a82611deb09092d009354846a806a9468dae9-4_-_Confirmation.png){kind=link}
Updated over 1 year ago
Code Examples
Customer-Friendly Surcharge
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