# API Keys Server-side API key authorization with hierarchical scopes and pattern-based access control. ## Packages | Package | npm | Description | |---------|-----|-------------| | [Base](./Base/README.md) | `@memberjunction/api-keys-base` | Metadata caching for API scopes, applications, and key bindings (client or server) | | [Engine](./Engine/README.md) | `@memberjunction/api-keys` | Server-side authorization engine with hierarchical scopes and application-level restrictions |