API Failure
An API Failure occurs when an Application Programming Interface does not return the expected response or fails to process a request successfully. Failures are typically categorized by HTTP status codes, ranging from client errors (4xx) to server errors (5xx).
Common Causes
- Invalid Arguments: The request payload contains malformed data, missing required fields, or violates schema constraints (e.g.,
400 Bad Request). - Authentication/Authorization: Missing or invalid tokens, insufficient permissions.
- Rate Limiting: Exceeding request quotas (
429 Too Many Requests). - Server Instability: Internal server errors, timeouts, or maintenance windows (
500,503).
Handling Strategies
- Retry Logic: Implement exponential backoff for transient failures.
- Validation: Pre-validate client-side data to prevent
400errors. - Logging: Capture full request/response cycles for debugging.
- Fallbacks: Provide default values or cached data when APIs are unavailable.
Related Concepts
- HTTP Status Codes
- Error Handling
- API Design
- Client-Side Validation