API Headers
Overview of API header customization patterns and implementation guides
API Headers
Overview
API headers provide essential context to backend services, enabling critical functionality including multi-tenancy, device identification, session tracking, and user preference customization. Our header architecture provides a consistent, extensible pattern for implementing and managing headers across your application.
This section includes our core architecture document along with specific implementation guides for common header types.
Header Architecture
Our header implementation uses a modular provider pattern that integrates with Zustand for state management and our API client architecture for request handling.
The header provider pattern creates a clear separation of concerns: state management is handled by Zustand stores, while the logic for transforming state into headers lives in providers.
Key Principles
- Modularity: Each header category is implemented as a separate provider
- Priority-Based Resolution: Conflicting headers are resolved based on provider priority
- State Integration: Zustand stores provide the state that powers dynamic headers
- Testability: Each header provider can be tested independently
- Extensibility: New header types can be added without modifying existing code
Implementation Guides
Header Customization Architecture
Core architectural patterns for implementing custom API headers
Multi-Tenant Headers
Implementation guide for organization and project context headers
Device Identification Headers
Implementation guide for device identification and tracking headers
Session Tracking Headers
Implementation guide for session tracking and correlation headers
User Preferences Headers
Implementation guide for personalized user preference headers
User-Agent Headers
Implementation guide for custom User-Agent headers
Header Types Overview
Identity Headers provide organizational context for multi-tenant applications.
- X-ORG-ID: Organization identifier
- X-PROJECT-ID: Project identifier within an organization
- X-TENANT-ID: Generic tenant identifier
These headers enable proper data segmentation and access control in multi-tenant environments.
Related Areas
- API Client Architecture - Base architecture for API clients
- Authentication Architecture - User authentication and tokens
- Client State Management - Zustand store patterns
- Error Handling Architecture - API error handling architecture