Upstash Redis Skill

This skill covers the three things serverless apps most often need Redis for: caching, sessions, and rate limiting. The client talks to Redis over HTTP, so it works where a long-lived TCP connection does not (edge middleware, short lived functions). Follow the steps in order; each ends with a checkpoint.

Requirements and limitations

• An Upstash Redis database (hosted service; usage-based pricing with a free tier). Credentials are a REST URL and token from the database page.
• Environment variables UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.
• Every command is an HTTP request. Batch with pipeline() or MGET/MSET when you issue many commands per request; avoid KEYS * in production.
• Values are serialized automatically (objects, arrays, numbers round-trip). Do not JSON.stringify before set or parseInt after get.

Step 1 — Install and create one client per module