API Integration
Connecting two systems so they exchange data and actions through a defined interface, the basic mechanism by which operators plug in games, payments, KYC and other services.
Definition
An API, or application programming interface, integration is a defined contract that lets one system request data or actions from another over agreed endpoints, message formats (commonly REST and JSON) and authentication. iGaming is heavily integration-driven: an operator's platform integrates with game aggregators and studios (launch, bets, wins), payment providers (deposits, withdrawals), KYC and geolocation vendors, and regulatory reporting interfaces. Good integrations specify error codes, timeouts, retries and idempotency so failures are handled safely, and they are tested against a sandbox before going live. Because so many parties connect, the quality of an API, its documentation, latency, reliability and versioning, has a large effect on how fast an operator can add content and services and how stable the result is.
Worked example
To add a payment method, an operator integrates the payment provider's API: endpoints to initiate a deposit, a webhook to notify when it settles, and a call to trigger a withdrawal, each authenticated with keys and tested end to end in the provider's sandbox before real transactions are enabled.
Why it matters
For learners, it is the plumbing that lets a site offer hundreds of games and many payment methods it did not build itself. For professionals, almost every capability an operator ships is an integration, so understanding API contracts, error handling and testing is foundational across engineering, payments and partnerships.