# SCA Getting Started
Secure Commerce Application (SCA) supports several deployment models.
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Please login or register to gain access to the detailed material on this page.
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LoginRegister for an Account
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Use this page to choose a path, prepare your environment, and complete a first transaction.
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**Choose your integration path**
* **Semi-integrated application** — Use this path when the POS controls the payment flow
* **Standalone application** — Use this path when transactions begin on the terminal
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### Review the standalone transaction model
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Start with the main behaviour and feature set. |  |
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Login
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{% if visitor.isSet === true %} SCA Standalone Specification
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### Confirm hardware and device flow
Validate the target terminal and screen flow before testing.
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Login
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{% if visitor.isSet === true %} Supported Hardware Media, Display and Transaction Flow
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### Apply processor-specific behaviour
Use a host guide when your processor changes the flow or supported commands.
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Login
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{% if visitor.isSet === true %} Chase Guide FirstData/Fiserv Guide
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### Prepare the device
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Confirm the device has the expected hardware and software. |  |
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Login
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{% if visitor.isSet === true %} Device Setup
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### Configure connectivity
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Choose the transport that matches your POS environment. |  |
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{% if visitor.isSet === true %} Communication Setup WebSocket TCP Configuration
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SCA can use ports 80 or 443.
If WebSocket auth bypass is enabled, standard pairing does not apply.
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### Establish POS trust
Most semi-integrated flows start with POS registration.
Verify the pairing before processing payments.
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Login
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### Open a session
Open a session before sending payment commands.
Use Training Mode while validating the flow.
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Login
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{% if visitor.isSet === true %} Start Session
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### Run a first transaction
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Use CAPTURE for a one-step sale. Use AUTH and CAPTURE for a two-step flow. |  |
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### Validate responses and harden the integration
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Map response fields before go-live. Then cover edge cases and recovery paths. |  |
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### Next steps
* **Build payment flows** — Use [Payment Functions](broken://spaces/V9KWPJkI0Tcdaj4xDy9z/pages/EVFtHtDowrmKmyCli4Ga) for semi-integrated, or [Supported Transactions](broken://spaces/V9KWPJkI0Tcdaj4xDy9z/pages/8c8d2de548191a53cede22af2734b6d4b9de9659) for standalone.
* **Configure devices and processors** — Review [Configuration Parameters](broken://spaces/V9KWPJkI0Tcdaj4xDy9z/pages/PQHN8x7FeooXfkNRfHjm), [Direct to Processor Implementations](broken://spaces/V9KWPJkI0Tcdaj4xDy9z/pages/HwFCkcZY2Ixc9nHmG36j), and [Feature Parity - Mx9 vs Engage vs Neo](broken://spaces/V9KWPJkI0Tcdaj4xDy9z/pages/7b36a6dbc5848ca3323b77ac08d8c68f7e4eec68).
* **Validate production readiness** — Review [Reports](broken://spaces/V9KWPJkI0Tcdaj4xDy9z/pages/MLS9DTrkogyHEbuN06a7), [Result/Error Codes](broken://spaces/V9KWPJkI0Tcdaj4xDy9z/pages/7FaBRwPY4ftHhRHfjD6v), and [Best Practices for Integration](broken://spaces/V9KWPJkI0Tcdaj4xDy9z/pages/W8608CxBOBWHbEmCjU6A).
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