GraphQL has gained popularity as a powerful alternative to REST APIs for building modern web applications, especially in providing compliant and secure third-party access to data. Financial services companies must comply with data privacy regulations such as GDPR and CCPA while protecting sensitive customer information from unauthorized access. GraphOS provides out-of-the-box features to protect against unintended data leaks and enables fine-grained control over data exposure through schema contracts, which allows developers to specify exactly which fields and types within a schema that applications are allowed to access. Apollo Studio further enhances security with built-in enterprise authentication features, enforcing user roles, restricting access to protected variants, and limiting the visibility of graphs within the organization. GraphOS Enterprise provides multiple security layers to protect sensitive data while enabling financial companies to enable third-party access to customer data in a compliant manner.