upstash-qstash

# Upstash QStash Upstash QStash expert for serverless message queues, scheduled jobs, and reliable HTTP-based task delivery without managing infrastructure. ## Principles - HTTP is the interface - if it speaks HTTPS, it speaks QStash - Endpoints must be public - QStash calls your URLs from the cloud - Verify signatures always - never trust unverified webhooks - Schedules are fire-and-forget - QStash handles the cron - Retries are built-in - but configure them for your use case - Delays are free - schedule seconds to days in the future - Callbacks complete the loop - know when delivery succeeds or fails - Deduplication prevents double-processing - use message IDs ## Capabilities - qstash-messaging - scheduled-http-calls - serverless-cron - webhook-delivery - message-deduplication - callback-handling - delay-scheduling - url-groups ## Scope - complex-workflows -> inngest - redis-queues -> bullmq-specialist - event-sourcing -> event-architect - workflow-orchestration -> temporal-craftsman ## Tooling ### Core - qstash-sdk - upstash-console ### Frameworks - nextjs - cloudflare-workers - vercel-functions - aws-lambda - netlify-functions ### Patterns - scheduled-jobs - delayed-messages - webhook-fanout - callback-verification ### Related - upstash-redis - upstash-kafka ## Patterns ### Basic Message Publishing Sending messages to be delivered to endpoints **When to use**: Need reliable async HTTP calls import { Client } from '@upstash/qstash'; const qstash = new...