Caching AI SDK v6 tool results with Redis
Cache AI SDK v6 tool results in Redis by writing a simple, clean TypeScript wrapper. Working code with Upstash Redis and an example tool.
Hi, I'm Josh. I write (and talk) about Redis.
I work at Upstash and spend most of my time around Redis. I started this site in May 2026 because there is no good resource that shows all the cool sh*t you can build with it and makes it easy for your ai agents to do the same.
I'm also using this site as a sandbox to figure out how content shows up in AI tools like Claude, ChatGPT, and Cursor. So everything you read here I write twice. Once for you, once for the agents (try fetching any post with the accept:text/markdown header!).
Builds
How do you store Vercel AI SDK chat history in Redis?
Persist Vercel AI SDK chat history in Redis with onFinish, saveChat, loadChat, and createIdGenerator. Working AI SDK 6 + Upstash Redis code.
Using Redis as a Session Store (2026 Guide)
How to use Redis as a session store: opaque cookie IDs, sliding TTLs, hash-vs-string layout, global revocation, and Redis 7.4 HEXPIRE, with verified @upstash/redis code.
Comparison
Upstash vs Redis Cloud: A 2026 comparison
Upstash vs Redis Cloud in 2026: Latency & performance benchmarks, pros & cons, use cases, pricing comparison
Data Structures
What is the Redis String Data Type?
Deep dive into the Redis string data type: SDS internals, int/embstr/raw encodings, all 25 commands, atomic counters, and Upstash Redis SDK examples.
Glossary
Rate Limiting Algorithms Compared: Fixed Window, Sliding Window, Token Bucket, Leaky Bucket
Fixed window, sliding window, token bucket, and leaky bucket compared with Redis Lua scripts, measured boundary-burst numbers, and when each algorithm wins.