Common API Patterns

These patterns and standards apply across all Open Access Forum APIs.

Core Standards

Authentication

OAuth 2.0 Client Credentials flow used by all APIs

Error Responses

Consistent error format and HTTP status codes

Event Structure

Standardized webhook event wrapper for real-time updates

Data Types

Common formats for dates, identifiers, addresses, and enumerations

Composable Models

Flexible pattern for building complex resources from modular sub-objects

Design Principles

RESTful Architecture

• Resource-based URLs
• Standard HTTP methods
• Stateless operations
• JSON request/response bodies

Developer Experience

• Consistent patterns across APIs
• Comprehensive error messages
• Standard library compatibility
• Clear documentation

Reliability

• Idempotent operations where possible
• Event deduplication support
• Retry-friendly responses
• Graceful degradation

Security

• HTTPS required
• OAuth 2.0 authentication
• Least privilege access
• No sensitive data in URLs