Upstash Redis Kv

This is a full-featured Redis client that talks to Upstash's REST API, giving you persistent key-value storage across Claude conversations. You get the complete Redis toolkit: strings, hashes, lists, sets, sorted sets, plus all the usual expiration and key management commands. It's genuinely useful when you need to cache data between messages, maintain counters or leaderboards, or store structured data that survives past the current chat. The implementation is solid with support for credential overrides and proper command-line flags. One thing to watch: it uses the REST interface rather than native Redis protocol, so there's some HTTP overhead, but that's the tradeoff for serverless Redis.