> ## Documentation Index
> Fetch the complete documentation index at: https://docs.alignet.com/llms.txt
> Use this file to discover all available pages before exploring further.

# POS authorization flow

> Availability of Onboarding data to the POS authorization flow.

When each entity is registered through the Onboarding API, its regulatory data is automatically synchronized with TransactionKeyDB through EventBridge.

```mermaid theme={"system"}
flowchart LR
    O["Onboarding API<br/>Entity registration"] --> E["EventBridge"]
    E --> T["TransactionKeyDB<br/>Processing account"]
    T --> A["POS authorization<br/>Acquirer and merchant data available"]
```

The synchronization makes the acquirer information, including BINs and institution codes, and merchant information available to POS authorization without manual intervention.

<Card title="View POS authorization" icon="credit-card" href="/en/pos">
  Review the `POST /authorize` endpoint documentation for POS.
</Card>