True or false? Custom integration s always require access to the third-party system’s APIs.

In the HubSpot Data Integration certification, this statement is True because a custom integration functions by enabling two distinct software applications to communicate and exchange data directly, which necessitates an interface for that interaction. Since APIs (Application Programming Interfaces) serve as the formal set of rules and protocols that allow external systems to access a platform's data or functionality, a developer cannot build a bespoke connection to a third-party system without access to its API endpoints. Without this access, the "handshake" between HubSpot and the external tool cannot be established, meaning data cannot be programmatically read, written, or updated between the two environments to maintain a synchronized tech stack.