The Alpaca API has added OAuth support, allowing developers to build applications with secure and transparent access to the platform's services without revealing sensitive information directly to users. This new feature enables a wider range of integrations and use cases, including trading platforms, signal services, mobile apps, and more, by providing an alternative to API key-based authentication. With OAuth support, developers can generate their own client IDs and secrets, and send users to the authorization page for secure access, reducing the risk of unauthorized access to user accounts. This addition expands the possibilities for Alpaca's developer community, allowing anyone with an Alpaca account to start building and developing new applications and services.