Rate limiting for serverless and edge apps with the @upstash/ratelimit TypeScript/JavaScript SDK backed by Upstash Redis. Use when adding a rate limiter or throttling to an API route, Next.js middleware, Vercel Edge, Cloudflare Workers, or any HTTP endpoint; returning 429 Too Many Requests; choosing between fixed window, sliding window, and token bucket algorithms; limiting per user, IP, API…
Install
npx skills add upstash/skills --skill upstash-ratelimit-jsnpx skills add upstash/skills --skill upstash-ratelimit-js -a claude-code -gnpx skills add upstash/skills --skill upstash-ratelimit-js -a codex -ggemini skills install https://github.com/upstash/skills.git --path skills/upstash-ratelimit-jsgh skill install upstash/skills upstash-ratelimit-jsgit clone --depth 1 https://github.com/upstash/skills /tmp/upstash__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/upstash__skills/skills/upstash-ratelimit-js ~/.claude/skills/upstash-ratelimit-js # Claude Code
cp -R /tmp/upstash__skills/skills/upstash-ratelimit-js ~/.agents/skills/upstash-ratelimit-js # Codex, Cursor, Gemini CLI, Copilot, OpenCode