# API Guide

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Getting Started
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Step-by-step guide from authentication to placing orders and handling payments.
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API Basics
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OAuth 2.0 credentials, sandbox vs production, pagination, and real-time updates.
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End-Customer Web Flows
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Hosted journeys for account opening, KYC, bank account linking, and autogiro signing.
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Real-Time Events (WebSocket)
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Persistent WebSocket connections for live order, transaction, and journey updates.
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Testing in Sandbox
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How the sandbox environment works, order settlement, and using NPC for journey testing.
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Account Data
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Balance, holdings, market value, and performance.