# QStash

**Canonical:** https://apis.io/providers/qstash/  
**Website:** https://upstash.com/qstash  
**APIs profiled:** 7

QStash is a serverless message queue and task scheduling REST API from Upstash that delivers HTTP messages to endpoints reliably without requiring any long-lived connections or infrastructure management. Built entirely on stateless HTTP requests, it is designed for serverless and edge runtimes where traditional message brokers are impractical. QStash supports automatic retries, CRON-based scheduling up to one year in advance, URL group broadcasting for fan-out delivery, FIFO queuing, dead-letter queues, and message deduplication. Developers simply POST a message with a destination URL and QStash handles guaranteed delivery with configurable retry logic and flow control.

## Kin Score — 47.9 / 100 (developing)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 47.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 63.4 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 52.6 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

## Agent readiness — 22.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (7)

- **QStash Dead Letter Queue API** — Manage dead letter queue messages
- **QStash Flow Control API** — Manage flow control keys for rate and parallelism limiting
- **QStash Logs API** — Retrieve message delivery logs
- **QStash Messages API** — Publish and manage messages
- **QStash Queues API** — Manage FIFO queues
- **QStash Schedules API** — Create and manage CRON-based scheduled messages
- **QStash URL Groups API** — Manage URL groups for fan-out delivery

## Agentic access (1)

- **Qstash Agentic Access** — 31 operations · 21 acting · 5 human-in-the-loop

## Security (2)

- **Qstash Authentication** — http · 1 scheme
- **Qstash Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Qstash Plans Pricing**

## Tags

Message Queue, Task Scheduling, Serverless, HTTP Messaging, Background Jobs, Webhook, Dead Letter Queue, Cron, Upstash

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/qstash/). Scores are computed from the provider's own public artifacts under a published rubric.