SDK Best Practices

An SDK (Software Development Kit) wraps an API in language-native types, retries, and auth. Used well, an SDK saves time and reduces bugs. Used poorly, it hides failures and leaks secrets.

Configuration

• Load credentials from environment variables, not hardcoded constants.
• Allow the base URL, timeout, and retry count to be overridden for testing.
• Inject an HTTP client so you can mock responses in tests.
• Configure a sensible default timeout (10-30 seconds).

Retries and Backoff

Wrap idempotent calls in exponential backoff with jitter. Respect Retry-After on 429 and 503. Cap retries to avoid runaway loops. For non-idempotent POST, pass an idempotency key so retries are safe.

Versioning

Pin the SDK to a major version to avoid breaking changes. Read the provider’s changelog before upgrading. When the API ships a new major version, migrate deliberately, not automatically.

Error Surfaces

Map API errors to typed exceptions your application can catch. Preserve the request ID so support tickets are traceable. Do not swallow exceptions silently.

Best Practices

• Keep the SDK thin; do not re-implement business logic in it.
• Log requests and responses at debug level (redact secrets).
• Prefer streaming methods for large responses to control memory.
• Use official SDKs when available - they handle auth, retries, and edge cases.
• Lock your dependency version in requirements.txt / package.json.