Apache Sling

Apache Sling is a RESTful web framework built on top of the Java Content Repository (JCR) standard. It maps HTTP requests to content resources using a resource-oriented URL decomposition model and uses scripts or servlets to render responses, supporting multiple scripting languages including HTL, JSP, Groovy, and server-side JavaScript. Apache Sling forms the foundation of Adobe Experience Manager (AEM) and is an Apache Software Foundation project with 300+ modular OSGi bundles.

Apache Sling publishes 3 APIs on the APIs.io network. Tagged areas include Content Management, Java, JCR, OSGi, and REST.

Apache Sling’s developer surface includes documentation, developer portal, getting-started guide, engineering blog, support, FAQ, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

23.1/100 emerging ▬ flat Agent 3/100 human only open core · Apache-2.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

3 APIs 9 Features 5 Use Cases

Content Management JavaJCROSGi REST Web Framework Open-SourceAdobe Experience Manager

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 23.1/100 · emerging

Contract Quality 0.0 / 23

Developer Ergonomics 7.3 / 18

Access Clarity 4.7 / 18

Operational Transparency 1.2 / 12

Contract Governance 0.0 / 11

Discoverability 5.8 / 9

Open Source Surface 4.0 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against 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 90 points between them, because the conditional facet above carries the other 10. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 90% 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/apache-sling: 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 3

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

Apache Sling Resource API

The Sling Resource API provides RESTful access to JCR content repository nodes via HTTP. Every content node is addressable as a URL, supporting GET, POST, PUT, DELETE, and MOVE ...

Apache Sling Scripting API

The Sling Scripting API enables server-side rendering through multiple scripting engines. Scripts are resolved from the content repository based on resource type and selectors, ...

Apache Sling Event API

The Sling Event API provides a job processing and eventing system built on OSGi EventAdmin. It supports distributed job queuing, scheduled job execution, event broadcasting acro...

Pricing Plans 1

Published pricing tiers and plan structures.

Apache Sling Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Apache Sling Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Apache Sling Finops

FINOPS

Features 9

Notable capabilities this provider offers.

Resource-Oriented REST API

Every JCR node is a REST resource accessible via URL with GET, POST, PUT, DELETE operations.

URL Decomposition

Flexible URL decomposition into resource path, selectors, extension, and suffix for content negotiation.

SlingPostServlet

Powerful POST servlet for content CRUD operations, supporting create, modify, delete, move, copy, and import.

Multi-Language Scripting

Server-side rendering with HTL, JSP, Groovy, FreeMarker, Thymeleaf, and Rhino JavaScript.

OSGi Modular Architecture

300+ modular OSGi bundles with hot-deploy capability and dynamic configuration.

Resource Type Hierarchy

Sling Resource Type system enables component inheritance and script resolution.

Event and Job Processing

Distributed job queue and event system for asynchronous content processing.

Health Check Framework

Extensible health check system for monitoring Sling instance components.

Replication and Distribution

Content distribution bundles for replicating content between Sling instances.

Scroll for all 9

Security Posture 2

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

Apache Sling Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Apache Sling Vulnerability Disclosure

security.txt · contact published

SECURITY

Use Cases 5

What developers build with this provider.

Content Management Systems

Build REST-based CMS solutions with JCR-backed content repositories.

Adobe Experience Manager

Foundation framework for AEM digital experience platform implementations.

Headless CMS

Serve structured JSON content via Sling's resource API for headless front-end applications.

Web Application Framework

Build OSGi-based Java web applications with RESTful resource routing.

Digital Asset Management

Manage and serve digital assets stored in JCR with metadata and rendition support.

Integrations 6

Pre-built integrations with other platforms and tools.

Adobe Experience Manager

Apache Sling is the foundational framework for Adobe Experience Manager (AEM).

Apache Jackrabbit Oak

JCR implementation providing the content repository backend for Sling.

Apache Felix

OSGi framework container that hosts Sling bundles and manages the service registry.

Apache Karaf

OSGi runtime alternative for deploying Sling-based applications.

Maven

Maven plugin (slingstart-maven-plugin) and Maven archetypes for Sling development.

Elasticsearch

Search integration for indexing JCR content via Sling's indexing framework.

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Build 4

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

Maven Central Packages

SDKs

Access & Security 2

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

FAQ

FAQ

Commercial 2

Pricing, plans, and the legal terms of use

License

License

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: apache-sling
name: Apache Sling
description: Apache Sling is a RESTful web framework built on top of the Java Content Repository (JCR) standard. It maps HTTP
  requests to content resources using a resource-oriented URL decomposition model and uses scripts or servlets to render responses,
  supporting multiple scripting languages including HTL, JSP, Groovy, and server-side JavaScript. Apache Sling forms the foundation
  of Adobe Experience Manager (AEM) and is an Apache Software Foundation project with 300+ modular OSGi bundles.
type: Index
deliveryModel:
  model: open-core
  license: Apache-2.0
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - pricing
  generated: '2026-08-28'
  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
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/apache-sling.png
tags:
- Content Management
- Java
- JCR
- OSGi
- REST
- Web Framework
- Open-Source
- Adobe Experience Manager
tags_raw:
- Content Management
- Java
- JCR
- OSGi
- REST
- Web Framework
- Open Source
- Adobe Experience Manager
created: '2026-03-16'
modified: '2026-04-19'
url: https://raw.githubusercontent.com/api-evangelist/apache-sling/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: apache-sling:apache-sling-resource-api
  name: Apache Sling Resource API
  description: 'The Sling Resource API provides RESTful access to JCR content repository nodes via HTTP. Every content node
    is addressable as a URL, supporting GET, POST, PUT, DELETE, and MOVE operations through the Sling Default GET/POST Servlets.
    Content is accessible in multiple formats via selector and extension: .json for structured data, .xml for XML export,
    .infinity.json for deep tree traversal, and .tidy.json for formatted output. The POST Servlet (SlingPostServlet) handles
    content creation, modification, deletion, move, copy, and import operations.'
  humanURL: https://sling.apache.org/documentation/the-sling-engine/resources.html
  tags:
  - REST
  - JCR
  - Content Management
  - Resources
  - Java
  properties:
  - type: Documentation
    url: https://sling.apache.org/documentation/the-sling-engine/resources.html
  - type: Documentation
    url: https://sling.apache.org/documentation/bundles/manipulating-content-the-slingpostservlet-servlets-post.html
- aid: apache-sling:apache-sling-scripting-api
  name: Apache Sling Scripting API
  description: The Sling Scripting API enables server-side rendering through multiple scripting engines. Scripts are resolved
    from the content repository based on resource type and selectors, supporting HTL (HTML Template Language / Sightly), JSP
    (JavaServer Pages), Groovy, FreeMarker, Thymeleaf, and server-side JavaScript via Rhino. The ScriptEngine API allows integration
    of any JSR-223 compatible scripting language.
  humanURL: https://sling.apache.org/documentation/bundles/scripting.html
  tags:
  - Scripting
  - HTL
  - JSP
  - Groovy
  - Templates
  - Java
  properties:
  - type: Documentation
    url: https://sling.apache.org/documentation/bundles/scripting.html
  - type: Documentation
    url: https://sling.apache.org/documentation/bundles/scripting/scripting-htl.html
- aid: apache-sling:apache-sling-event-api
  name: Apache Sling Event API
  description: The Sling Event API provides a job processing and eventing system built on OSGi EventAdmin. It supports distributed
    job queuing, scheduled job execution, event broadcasting across cluster nodes, and workflow triggering. The JobManager
    API enables job creation, monitoring, and management through a programmatic interface and also provides REST endpoints
    via the Web Console integration.
  humanURL: https://sling.apache.org/documentation/bundles/apache-sling-eventing-and-job-handling.html
  tags:
  - Event
  - Job
  - Async
  - OSGi
  - Workflows
  tags_raw:
  - Events
  - Jobs
  - Async
  - OSGi
  - Workflow
  properties:
  - type: Documentation
    url: https://sling.apache.org/documentation/bundles/apache-sling-eventing-and-job-handling.html
common:
- type: Website
  url: https://www.apache.org/
- type: CodeOfConduct
  url: https://github.com/apache/sling/blob/master/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/apache/sling/blob/master/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/apache/sling/blob/master/LICENSE
- type: VulnerabilityDisclosure
  url: security/apache-sling-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/apache-sling-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/apache/sling-org-apache-sling-api
- type: GitHubRepository
  url: https://github.com/apache/sling
- type: Documentation
  url: https://sling.apache.org/documentation.html
- type: Portal
  url: https://sling.apache.org/
- type: GettingStarted
  url: https://sling.apache.org/documentation/getting-started.html
- type: Blog
  url: https://sling.apache.org/news.html
- type: Support
  url: https://sling.apache.org/project-information/mailing-lists.html
- type: TermsOfService
  url: https://www.apache.org/licenses/
- type: FAQ
  url: https://cwiki.apache.org/confluence/display/SLING/
- type: SDKs
  url: https://search.maven.org/search?q=org.apache.sling
  title: Maven Central Packages
- type: Features
  data:
  - name: Resource-Oriented REST API
    description: Every JCR node is a REST resource accessible via URL with GET, POST, PUT, DELETE operations.
  - name: URL Decomposition
    description: Flexible URL decomposition into resource path, selectors, extension, and suffix for content negotiation.
  - name: SlingPostServlet
    description: Powerful POST servlet for content CRUD operations, supporting create, modify, delete, move, copy, and import.
  - name: Multi-Language Scripting
    description: Server-side rendering with HTL, JSP, Groovy, FreeMarker, Thymeleaf, and Rhino JavaScript.
  - name: OSGi Modular Architecture
    description: 300+ modular OSGi bundles with hot-deploy capability and dynamic configuration.
  - name: Resource Type Hierarchy
    description: Sling Resource Type system enables component inheritance and script resolution.
  - name: Event and Job Processing
    description: Distributed job queue and event system for asynchronous content processing.
  - name: Health Check Framework
    description: Extensible health check system for monitoring Sling instance components.
  - name: Replication and Distribution
    description: Content distribution bundles for replicating content between Sling instances.
- type: UseCases
  data:
  - name: Content Management Systems
    description: Build REST-based CMS solutions with JCR-backed content repositories.
  - name: Adobe Experience Manager
    description: Foundation framework for AEM digital experience platform implementations.
  - name: Headless CMS
    description: Serve structured JSON content via Sling's resource API for headless front-end applications.
  - name: Web Application Framework
    description: Build OSGi-based Java web applications with RESTful resource routing.
  - name: Digital Asset Management
    description: Manage and serve digital assets stored in JCR with metadata and rendition support.
- type: Integrations
  data:
  - name: Adobe Experience Manager
    description: Apache Sling is the foundational framework for Adobe Experience Manager (AEM).
  - name: Apache Jackrabbit Oak
    description: JCR implementation providing the content repository backend for Sling.
  - name: Apache Felix
    description: OSGi framework container that hosts Sling bundles and manages the service registry.
  - name: Apache Karaf
    description: OSGi runtime alternative for deploying Sling-based applications.
  - name: Maven
    description: Maven plugin (slingstart-maven-plugin) and Maven archetypes for Sling development.
  - name: Elasticsearch
    description: Search integration for indexing JCR content via Sling's indexing framework.
maintainers:
- FN: Kin Lane
  email: info@apievangelist.com

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/apache-sling"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/apache-sling/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/apache-sling/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.