cloudflare-kv

Cloudflare KV stores key-value data at edge locations worldwide, enabling you to cache API responses with configurable TTL and cacheTtl settings. Use KV bindings in Wrangler to set up namespaces, then call put() to store responses and get() to retrieve them on subsequent requests.

Yes, Cloudflare KV supports TTL-based expiration through the expirationTtl parameter when putting a key. You can also use cacheTtl to control edge cache duration separately from storage TTL, allowing keys to expire at different intervals.

Store configuration objects and feature flags as JSON metadata in Cloudflare KV namespaces, then retrieve and parse them in Workers. Combine with TTL settings to refresh configurations automatically without redeploying code.

KV operations may fail with KV_ERROR conditions or 429 rate-limit responses. Handle these by implementing retry logic, fallback values, or graceful degradation in your Worker code to maintain application resilience.

Yes, KV provides list() with pagination support for iterating stored keys, and bulk read operations for fetching multiple values efficiently. Use metadata alongside keys to organize and filter stored data.

Wrangler is the standard development and deployment tool for managing KV namespaces and Workers. While the Cloudflare Workers SDK provides runtime APIs, Wrangler handles namespace binding, local testing, and production setup.