QStash website screenshot

QStash

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.

QStash publishes 7 APIs on the APIs.io network, including Dead Letter Queue API, Flow Control API, Logs API, and 4 more. Tagged areas include Message Queue, Task Scheduling, Serverless, HTTP Messaging, and Background Jobs.

The QStash catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

QStash’s developer surface includes authentication, documentation, engineering blog, pricing, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub
54.9/100 developing ▬ flat Agent 34/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemiumSelf serve⚡ Free to try
7 APIs
Message QueueTask SchedulingServerlessHTTP MessagingBackground JobsWebhooksDead Letter QueueCRONUpstash

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 54.9/100 · developing
Contract Quality 18.1 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 6.8 / 13
Governance 8.3 / 12
Discoverability 7.4 / 10
Agent readiness — 34/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/qstash: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

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

Scroll for all 7

Pricing Plans 1

Published pricing tiers and plan structures.

Qstash Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Qstash Rate Limits

10 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Qstash Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Qstash Context

10 classes · 31 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

QStash API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

QStash Message

17 properties

JSON SCHEMA

QStash Schedule

8 properties

JSON SCHEMA

Examples 3

Example request and response payloads for these APIs.

Batch Publish

4 fields

EXAMPLE

Create Schedule

4 fields

EXAMPLE

Publish Message

4 fields

EXAMPLE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Qstash Authentication

http · 1 scheme

SECURITY

Qstash Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Qstash Agentic Access

31 operations · 21 acting · 5 human-in-the-loop

31 operations · 21 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Vocabulary
Vocabulary
 JSONLDContext
JSONLDContext

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

Website
Website
 LinkedIn
LinkedIn
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: qstash
name: QStash
description: 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.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/qstash.png
url: https://raw.githubusercontent.com/api-evangelist/qstash/refs/heads/main/apis.yml
created: '2026-06-12'
modified: '2026-06-12'
specificationVersion: '0.19'
tags:
- Message Queue
- Task Scheduling
- Serverless
- HTTP Messaging
- Background Jobs
- Webhooks
- Dead Letter Queue
- CRON
- Upstash
apis:
- aid: qstash:qstash-dead-letter-queue-api
  name: QStash Dead Letter Queue API
  description: Manage dead letter queue messages
  humanURL: https://upstash.com/docs/qstash/overall/getstarted
  baseURL: https://qstash.upstash.io/v2
  tags:
  - Dead Letter Queue
  properties:
  - type: OpenAPI
    url: openapi/qstash-dead-letter-queue-api-openapi.yml
  - type: Documentation
    url: https://upstash.com/docs/qstash/overall/getstarted
- aid: qstash:qstash-flow-control-api
  name: QStash Flow Control API
  description: Manage flow control keys for rate and parallelism limiting
  humanURL: https://upstash.com/docs/qstash/overall/getstarted
  baseURL: https://qstash.upstash.io/v2
  tags:
  - Flow Control
  properties:
  - type: OpenAPI
    url: openapi/qstash-flow-control-api-openapi.yml
  - type: Documentation
    url: https://upstash.com/docs/qstash/overall/getstarted
- aid: qstash:qstash-logs-api
  name: QStash Logs API
  description: Retrieve message delivery logs
  humanURL: https://upstash.com/docs/qstash/overall/getstarted
  baseURL: https://qstash.upstash.io/v2
  tags:
  - Logs
  properties:
  - type: OpenAPI
    url: openapi/qstash-logs-api-openapi.yml
  - type: Documentation
    url: https://upstash.com/docs/qstash/overall/getstarted
- aid: qstash:qstash-messages-api
  name: QStash Messages API
  description: Publish and manage messages
  humanURL: https://upstash.com/docs/qstash/overall/getstarted
  baseURL: https://qstash.upstash.io/v2
  tags:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/qstash-messages-api-openapi.yml
  - type: Documentation
    url: https://upstash.com/docs/qstash/overall/getstarted
- aid: qstash:qstash-queues-api
  name: QStash Queues API
  description: Manage FIFO queues
  humanURL: https://upstash.com/docs/qstash/overall/getstarted
  baseURL: https://qstash.upstash.io/v2
  tags:
  - Queues
  properties:
  - type: OpenAPI
    url: openapi/qstash-queues-api-openapi.yml
  - type: Documentation
    url: https://upstash.com/docs/qstash/overall/getstarted
- aid: qstash:qstash-schedules-api
  name: QStash Schedules API
  description: Create and manage CRON-based scheduled messages
  humanURL: https://upstash.com/docs/qstash/overall/getstarted
  baseURL: https://qstash.upstash.io/v2
  tags:
  - Schedules
  properties:
  - type: OpenAPI
    url: openapi/qstash-schedules-api-openapi.yml
  - type: Documentation
    url: https://upstash.com/docs/qstash/overall/getstarted
- aid: qstash:qstash-url-groups-api
  name: QStash URL Groups API
  description: Manage URL groups for fan-out delivery
  humanURL: https://upstash.com/docs/qstash/overall/getstarted
  baseURL: https://qstash.upstash.io/v2
  tags:
  - URL Groups
  properties:
  - type: OpenAPI
    url: openapi/qstash-url-groups-api-openapi.yml
  - type: Documentation
    url: https://upstash.com/docs/qstash/overall/getstarted
common:
- type: AgenticAccess
  url: agentic-access/qstash-agentic-access.yml
- type: DomainSecurity
  url: security/qstash-domain-security.yml
- type: Authentication
  url: authentication/qstash-authentication.yml
- type: Website
  url: https://upstash.com/qstash
- type: Documentation
  url: https://upstash.com/docs/qstash/overall/getstarted
- type: GitHubOrg
  url: https://github.com/upstash
- type: LinkedIn
  url: https://www.linkedin.com/company/upstash
- type: Blog
  url: https://upstash.com/blog
- type: Pricing
  url: https://upstash.com/pricing/qstash
- type: StatusPage
  url: https://status.upstash.com/
- type: X
  url: https://x.com/upstash
- type: Plans
  url: plans/qstash-plans-pricing.yml
- type: RateLimits
  url: rate-limits/qstash-rate-limits.yml
- type: FinOps
  url: finops/qstash-finops.yml
- type: Vocabulary
  url: vocabulary/qstash-vocabulary.yml
- type: JSONLDContext
  url: json-ld/qstash-context.jsonld
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com