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Upstash · Class

Queue

QStash queues send messages to an endpoint in FIFO order. They default to one active message, but you can configure parallelism for higher throughput.

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Syntax

client.queue({ queueName }).upsert({ parallelism });
client.queue({ queueName }).enqueueJSON({ url, body });
client.queue({ queueName }).get()

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • Flow Control
  • Retry
  • Callbacks
  • Failure callbacks
  • Dead Letter Queues
  • At-Least-Once Delivery
  • Deduplication

Source: QStash Queues - Upstash Documentation. Checked 2026-11-03.