Celery

Celery is an open-source distributed task queue for Python. It allows you to run tasks asynchronously in the background, enabling scalable distributed systems with support for multiple message brokers (RabbitMQ, Redis, Amazon SQS) and result backends. Celery provides a rich set of Python programming APIs for defining tasks, composing workflows, scheduling periodic work, executing on workers, and monitoring execution.

Celery publishes 8 APIs on the APIs.io network. Tagged areas include Asynchronous, Distributed Systems, Message Queue, Open Source, and Python.

The Celery catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Celery’s developer surface includes documentation, getting-started guide, GitHub presence, changelog, CLI, authentication, sandbox, and 26 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.1/100 thin ▬ flat Agent 22/100 agent aware Front door AI 1/6 silent Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

AccessFreemium

8 APIs

Asynchronous Distributed Systems Message Queue Open Source Python Task Queue Real-Time

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 39.1/100 · thin

Contract Quality 8.3 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 1.3 / 17

Operational Transparency 4.7 / 11

Contract Governance 1.9 / 10

Discoverability 5.3 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/celery: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 8

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

Celery Task API

Core API for defining and executing distributed tasks in Celery. Supports task decorators, retries, timeouts, rate limiting, and custom task classes.

Celery Application API

Application configuration and initialization API for Celery, used to configure brokers, result backends, serialization, routing, and task discovery.

Celery Canvas API

Canvas is Celery's workflow composition API for building complex task orchestrations using signatures, chains, groups, chords, maps, starmaps, and chunks.

Celery Beat API

Celery Beat is the scheduler for periodic tasks, supporting crontab-style schedules, interval schedules, and solar schedules. It can also be backed by a database scheduler for d...

Celery Worker API

Worker API for executing distributed tasks with configurable concurrency (prefork, gevent, eventlet, solo, threads), autoscaling, remote control, and signal handling.

Celery Result Backend API

Result backend API for storing and retrieving task results and state using backends such as Redis, RPC, database, Memcached, Cassandra, and S3.

Celery Signals API

Signals API for hooking into Celery lifecycle events including task, worker, beat, and consumer signals to build extensions and observability.

Celery Monitoring and Events API

Event streaming and monitoring API for inspecting workers, tasks, and queues. Supports the curses-based celery events monitor and third-party tools such as Flower.

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

Celery Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Celery Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Celery Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Celery Worker Event Stream

Celery workers publish a monitoring event stream over the configured broker. This document is a faithful transcription of the published Event Reference in the Celery Monitoring ...

ASYNCAPI

Security Posture 3

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

Celery Authentication

3 schemes

SECURITY

Celery Domain Security

TLSv1.3 · DNSSEC

SECURITY

Celery Vulnerability Disclosure

Hackerone

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

Reference

Reference

AsyncAPI

AsyncAPI

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

Build 5

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

GitHubOrganization

Packages

SDKs

CLI

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Security

Security

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

Operate 7

Status, limits, changes, and where to get help

ChangeLog

Community

Issues

Roadmap

Deprecation

ChangeLog

RateLimits

Scroll for all 7

Commercial 3

Pricing, plans, and the legal terms of use

License

License

Plans

Plans

FinOps

FinOps

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

PyPI

PyPI

Contributing

Contributing

Source (apis.yml)

aid: celery
url: https://raw.githubusercontent.com/api-evangelist/celery/refs/heads/main/apis.yml
name: Celery
x-docs-platform: readthedocs
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-09-21
tags:
- Asynchronous
- Distributed Systems
- Message Queue
- Open Source
- Python
- Task Queue
- Real-Time
tags_raw:
- Asynchronous
- Distributed Systems
- Message Queue
- Open Source
- Python
- Task Queue
- Open-Source
- Real-Time
type: Index
deliveryModel:
  model: unknown
  license_evidence:
    repo: celery/celery
    spdx: NOASSERTION
    stars: 28913
  open_source: unknown
  commercial: true
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - pricing
  - repository-unlicensed
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/celery.png
access: Open Source
created: '2024-01-15'
modified: '2026-09-05'
position: Consuming
specificationVersion: '0.23'
description: Celery is an open-source distributed task queue for Python. It allows you to run tasks asynchronously in the
  background, enabling scalable distributed systems with support for multiple message brokers (RabbitMQ, Redis, Amazon SQS)
  and result backends. Celery provides a rich set of Python programming APIs for defining tasks, composing workflows, scheduling
  periodic work, executing on workers, and monitoring execution.
apis:
- aid: celery:celery-task-api
  name: Celery Task API
  tags:
  - Python
  - Task Queue
  - Task
  tags_raw:
  - Python
  - Task Queue
  - Tasks
  humanURL: https://docs.celeryq.dev/en/stable/userguide/tasks.html
  properties:
  - url: https://docs.celeryq.dev/en/stable/userguide/tasks.html
    type: Documentation
  - url: https://docs.celeryq.dev/en/stable/reference/celery.app.task.html
    type: Reference
  - url: https://docs.celeryq.dev/en/stable/getting-started/
    type: GettingStarted
  description: Core API for defining and executing distributed tasks in Celery. Supports task decorators, retries, timeouts,
    rate limiting, and custom task classes.
- aid: celery:celery-application-api
  name: Celery Application API
  tags:
  - Application
  - Configuration
  humanURL: https://docs.celeryq.dev/en/stable/userguide/application.html
  properties:
  - url: https://docs.celeryq.dev/en/stable/userguide/application.html
    type: Documentation
  - url: https://docs.celeryq.dev/en/stable/reference/celery.html
    type: Reference
  - url: https://docs.celeryq.dev/en/stable/userguide/configuration.html
    type: Configuration
  description: Application configuration and initialization API for Celery, used to configure brokers, result backends, serialization,
    routing, and task discovery.
- aid: celery:celery-canvas-api
  name: Celery Canvas API
  tags:
  - Workflows
  - Chains
  - Group
  - Chords
  tags_raw:
  - Workflows
  - Chains
  - Groups
  - Chords
  humanURL: https://docs.celeryq.dev/en/stable/userguide/canvas.html
  properties:
  - url: https://docs.celeryq.dev/en/stable/userguide/canvas.html
    type: Documentation
  description: Canvas is Celery's workflow composition API for building complex task orchestrations using signatures, chains,
    groups, chords, maps, starmaps, and chunks.
- aid: celery:celery-beat-api
  name: Celery Beat API
  tags:
  - Scheduling
  - Periodic Tasks
  humanURL: https://docs.celeryq.dev/en/stable/userguide/periodic-tasks.html
  properties:
  - url: https://docs.celeryq.dev/en/stable/userguide/periodic-tasks.html
    type: Documentation
  - url: https://docs.celeryq.dev/en/stable/reference/celery.beat.html
    type: Reference
  description: Celery Beat is the scheduler for periodic tasks, supporting crontab-style schedules, interval schedules, and
    solar schedules. It can also be backed by a database scheduler for dynamic schedules.
- aid: celery:celery-worker-api
  name: Celery Worker API
  tags:
  - Worker
  - Execution
  - Concurrency
  humanURL: https://docs.celeryq.dev/en/stable/userguide/workers.html
  properties:
  - url: https://docs.celeryq.dev/en/stable/userguide/workers.html
    type: Documentation
  - url: https://docs.celeryq.dev/en/stable/reference/celery.worker.html
    type: Reference
  description: Worker API for executing distributed tasks with configurable concurrency (prefork, gevent, eventlet, solo,
    threads), autoscaling, remote control, and signal handling.
- aid: celery:celery-result-api
  name: Celery Result Backend API
  tags:
  - Results
  - States
  - Storage
  tags_raw:
  - Results
  - State
  - Storage
  humanURL: https://docs.celeryq.dev/en/stable/userguide/tasks.html#result-backends
  properties:
  - url: https://docs.celeryq.dev/en/stable/userguide/tasks.html#result-backends
    type: Documentation
  - url: https://docs.celeryq.dev/en/stable/reference/celery.result.html
    type: Reference
  description: Result backend API for storing and retrieving task results and state using backends such as Redis, RPC, database,
    Memcached, Cassandra, and S3.
- aid: celery:celery-signals-api
  name: Celery Signals API
  tags:
  - Signals
  - Event
  - Extensions
  tags_raw:
  - Signals
  - Events
  - Extensions
  humanURL: https://docs.celeryq.dev/en/stable/userguide/signals.html
  properties:
  - url: https://docs.celeryq.dev/en/stable/userguide/signals.html
    type: Documentation
  - url: https://docs.celeryq.dev/en/stable/reference/celery.signals.html
    type: Reference
  description: Signals API for hooking into Celery lifecycle events including task, worker, beat, and consumer signals to
    build extensions and observability.
- aid: celery:celery-monitoring-api
  name: Celery Monitoring and Events API
  tags:
  - Monitoring
  - Event
  - Observability
  tags_raw:
  - Monitoring
  - Events
  - Observability
  humanURL: https://docs.celeryq.dev/en/stable/userguide/monitoring.html
  properties:
  - url: https://docs.celeryq.dev/en/stable/userguide/monitoring.html
    type: Documentation
  - url: https://docs.celeryq.dev/en/stable/reference/celery.events.html
    type: Reference
  description: Event streaming and monitoring API for inspecting workers, tasks, and queues. Supports the curses-based celery
    events monitor and third-party tools such as Flower.
common:
- type: DomainSecurity
  url: security/celery-domain-security.yml
- type: Website
  url: https://docs.celeryq.dev/
- type: Documentation
  url: https://docs.celeryq.dev/en/stable/
- type: Reference
  url: https://docs.celeryq.dev/en/stable/reference/index.html
- type: GettingStarted
  url: https://docs.celeryq.dev/en/stable/getting-started/
- type: GitHub
  url: https://github.com/celery/celery
- type: PyPI
  url: https://pypi.org/project/celery/
- type: ChangeLog
  url: https://docs.celeryq.dev/en/stable/changelog.html
- type: Community
  url: https://github.com/celery/celery/discussions
- type: Issues
  url: https://github.com/celery/celery/issues
- type: Contributing
  url: https://docs.celeryq.dev/en/stable/contributing.html
- type: License
  url: https://github.com/celery/celery/blob/main/LICENSE
- type: GitHubOrganization
  url: https://github.com/celery
- type: Roadmap
  url: https://github.com/celery/ceps
- type: Security
  url: https://github.com/celery/celery/security/policy
- type: Deprecation
  url: https://docs.celeryq.dev/en/stable/internals/deprecation.html
- type: Packages
  url: packages/celery-packages.yml
- type: SDKs
  url: packages/celery-packages.yml
- type: CLI
  url: cli/celery-cli.yml
- type: Authentication
  url: authentication/celery-authentication.yml
- type: Conventions
  url: conventions/celery-conventions.yml
- type: ErrorCatalog
  url: errors/celery-error-codes.yml
- type: Lifecycle
  url: lifecycle/celery-lifecycle.yml
- type: ChangeLog
  url: changelog/celery-changelog.yml
- type: Conformance
  url: conformance/celery-conformance.yml
- type: Sandbox
  url: sandbox/celery-sandbox.yml
- type: VulnerabilityDisclosure
  url: security/celery-vulnerability-disclosure.yml
- type: AsyncAPI
  url: asyncapi/celery-events-asyncapi.yml
- type: LLMsTxt
  url: llms/celery-llms.txt
- type: X-MCPServerCandidate
  url: mcp/celery-mcp.yml
- type: Plans
  url: plans/celery-plans-pricing.yml
- type: RateLimits
  url: rate-limits/celery-rate-limits.yml
- type: FinOps
  url: finops/celery-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-09-05'
  status: enriched
  artifacts_added: 14
  pass: local-v3

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