Eclipse RDF4J

Eclipse RDF4J is a powerful open-source Java framework for processing and handling RDF data. It supports creating, parsing, scalable storage, reasoning, and querying with RDF and Linked Data, and ships with an HTTP server (RDF4J Server) and a web-based Workbench. The framework offers an easy-to-use Java API and SPARQL 1.1 support, and integrates with leading RDF database solutions.

Eclipse RDF4J publishes 7 APIs on the APIs.io network, including Contexts API, Namespaces API, Protocol API, and 4 more. Tagged areas include Eclipse Foundation, Java, Linked Data, Open-Source, and RDF.

Eclipse RDF4J’s developer surface includes getting-started guide, documentation, changelog, support, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub

29.6/100 thin ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

1 APIs

Eclipse Foundation Java Linked Data Open-Source RDF Semantic Web SPARQLTriple Store

Kin Score

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

Composite quality — 29.6/100 · thin

Contract Quality 9.8 / 23

Developer Ergonomics 3.0 / 18

Access Clarity 2.8 / 18

Operational Transparency 4.3 / 12

Contract Governance 0.0 / 11

Discoverability 5.3 / 9

Create-or-Update Ergonomics 2.2 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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/eclipse-rdf4j: 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 7

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

Eclipse RDF4J Contexts API

Inspect named graphs (contexts) in a repository.

Eclipse RDF4J Namespaces API

Manage namespace prefix declarations.

Eclipse RDF4J Protocol API

Protocol version of the server.

Eclipse RDF4J Repositories API

Manage and inspect RDF repositories.

Eclipse RDF4J Size API

Get the number of statements in a repository.

Eclipse RDF4J Statements API

Read and modify the RDF statements in a repository.

Eclipse RDF4J Transactions API

Group multiple operations in an atomic transaction.

Scroll for all 7

Open Collections 9

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

RDF4J Server REST Contexts API

OPEN COLLECTION

RDF4J Server REST Contexts Namespaces API

OPEN COLLECTION

RDF4J Server REST Contexts Protocol API

OPEN COLLECTION

RDF4J Server REST Contexts Repositories API

OPEN COLLECTION

RDF4J Server REST Contexts Size API

OPEN COLLECTION

RDF4J Server REST Contexts Statements API

OPEN COLLECTION

RDF4J Server REST Contexts Transactions API

OPEN COLLECTION

RDF4J Server REST API

OPEN COLLECTION

Scroll for all 9

Pricing Plans 1

Published pricing tiers and plan structures.

Eclipse Rdf4J Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Eclipse Rdf4J Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Eclipse Rdf4J Finops

FINOPS

Security Posture 1

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

Eclipse Rdf4J Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Eclipse Rdf4J Agentic Access

20 operations · 12 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

SecurityPolicy

SecurityPolicy

DomainSecurity

DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

Tutorials

Tutorials

Operate 4

Status, limits, changes, and where to get help

Releases

ChangeLog

Issues

Support

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: eclipse-rdf4j
name: Eclipse RDF4J
description: Eclipse RDF4J is a powerful open-source Java framework for processing and handling RDF data. It supports creating,
  parsing, scalable storage, reasoning, and querying with RDF and Linked Data, and ships with an HTTP server (RDF4J Server)
  and a web-based Workbench. The framework offers an easy-to-use Java API and SPARQL 1.1 support, and integrates with leading
  RDF database solutions.
type: Index
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  - repository-unlicensed
  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
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/eclipse-rdf4j.png
url: https://raw.githubusercontent.com/api-evangelist/eclipse-rdf4j/refs/heads/main/apis.yml
tags:
- Eclipse Foundation
- Java
- Linked Data
- Open-Source
- RDF
- Semantic Web
- SPARQL
- Triple Store
tags_raw:
- Eclipse Foundation
- Java
- Linked Data
- Open Source
- RDF
- Semantic Web
- SPARQL
- Triple Store
created: '2024-01-01'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: eclipse-rdf4j:eclipse-rdf4j-contexts-api
  name: Eclipse RDF4J Contexts API
  description: Inspect named graphs (contexts) in a repository.
  humanURL: https://rdf4j.org/documentation/reference/rest-api/
  baseURL: http://localhost:8080/rdf4j-server
  tags:
  - Context
  tags_raw:
  - Contexts
  properties:
  - type: OpenAPI
    url: openapi/eclipse-rdf4j-contexts-api-openapi.yml
  - type: Documentation
    url: https://rdf4j.org/documentation/reference/rest-api/
  - type: GettingStarted
    url: https://rdf4j.org/documentation/programming/getting-started/
  - type: Repository
    url: https://github.com/eclipse/rdf4j
- aid: eclipse-rdf4j:eclipse-rdf4j-namespaces-api
  name: Eclipse RDF4J Namespaces API
  description: Manage namespace prefix declarations.
  humanURL: https://rdf4j.org/documentation/reference/rest-api/
  baseURL: http://localhost:8080/rdf4j-server
  tags:
  - Namespaces
  properties:
  - type: OpenAPI
    url: openapi/eclipse-rdf4j-namespaces-api-openapi.yml
  - type: Documentation
    url: https://rdf4j.org/documentation/reference/rest-api/
  - type: GettingStarted
    url: https://rdf4j.org/documentation/programming/getting-started/
  - type: Repository
    url: https://github.com/eclipse/rdf4j
- aid: eclipse-rdf4j:eclipse-rdf4j-protocol-api
  name: Eclipse RDF4J Protocol API
  description: Protocol version of the server.
  humanURL: https://rdf4j.org/documentation/reference/rest-api/
  baseURL: http://localhost:8080/rdf4j-server
  tags:
  - Protocol
  properties:
  - type: OpenAPI
    url: openapi/eclipse-rdf4j-protocol-api-openapi.yml
  - type: Documentation
    url: https://rdf4j.org/documentation/reference/rest-api/
  - type: GettingStarted
    url: https://rdf4j.org/documentation/programming/getting-started/
  - type: Repository
    url: https://github.com/eclipse/rdf4j
- aid: eclipse-rdf4j:eclipse-rdf4j-repositories-api
  name: Eclipse RDF4J Repositories API
  description: Manage and inspect RDF repositories.
  humanURL: https://rdf4j.org/documentation/reference/rest-api/
  baseURL: http://localhost:8080/rdf4j-server
  tags:
  - Repositories
  properties:
  - type: OpenAPI
    url: openapi/eclipse-rdf4j-repositories-api-openapi.yml
  - type: Documentation
    url: https://rdf4j.org/documentation/reference/rest-api/
  - type: GettingStarted
    url: https://rdf4j.org/documentation/programming/getting-started/
  - type: Repository
    url: https://github.com/eclipse/rdf4j
- aid: eclipse-rdf4j:eclipse-rdf4j-size-api
  name: Eclipse RDF4J Size API
  description: Get the number of statements in a repository.
  humanURL: https://rdf4j.org/documentation/reference/rest-api/
  baseURL: http://localhost:8080/rdf4j-server
  tags:
  - Size
  properties:
  - type: OpenAPI
    url: openapi/eclipse-rdf4j-size-api-openapi.yml
  - type: Documentation
    url: https://rdf4j.org/documentation/reference/rest-api/
  - type: GettingStarted
    url: https://rdf4j.org/documentation/programming/getting-started/
  - type: Repository
    url: https://github.com/eclipse/rdf4j
- aid: eclipse-rdf4j:eclipse-rdf4j-statements-api
  name: Eclipse RDF4J Statements API
  description: Read and modify the RDF statements in a repository.
  humanURL: https://rdf4j.org/documentation/reference/rest-api/
  baseURL: http://localhost:8080/rdf4j-server
  tags:
  - Statements
  properties:
  - type: OpenAPI
    url: openapi/eclipse-rdf4j-statements-api-openapi.yml
  - type: Documentation
    url: https://rdf4j.org/documentation/reference/rest-api/
  - type: GettingStarted
    url: https://rdf4j.org/documentation/programming/getting-started/
  - type: Repository
    url: https://github.com/eclipse/rdf4j
- aid: eclipse-rdf4j:eclipse-rdf4j-transactions-api
  name: Eclipse RDF4J Transactions API
  description: Group multiple operations in an atomic transaction.
  humanURL: https://rdf4j.org/documentation/reference/rest-api/
  baseURL: http://localhost:8080/rdf4j-server
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/eclipse-rdf4j-transactions-api-openapi.yml
  - type: Documentation
    url: https://rdf4j.org/documentation/reference/rest-api/
  - type: GettingStarted
    url: https://rdf4j.org/documentation/programming/getting-started/
  - type: Repository
    url: https://github.com/eclipse/rdf4j
common:
- type: Website
  url: https://www.rdf4j.org/
- type: Releases
  url: https://github.com/eclipse/rdf4j/releases
- type: SecurityPolicy
  url: https://github.com/eclipse-rdf4j/rdf4j/blob/main/SECURITY.md
- type: CodeOfConduct
  url: https://github.com/eclipse-rdf4j/rdf4j/blob/main/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/eclipse-rdf4j/rdf4j/blob/main/CONTRIBUTING.md
- type: AgenticAccess
  url: agentic-access/eclipse-rdf4j-agentic-access.yml
- type: DomainSecurity
  url: security/eclipse-rdf4j-domain-security.yml
- type: GettingStarted
  url: https://rdf4j.org/documentation/programming/getting-started/
- type: Documentation
  url: https://rdf4j.org/documentation/
- type: Tutorials
  url: https://rdf4j.org/documentation/tutorials/
- type: ChangeLog
  url: https://rdf4j.org/release-notes/
- type: Issues
  url: https://github.com/eclipse/rdf4j/issues
- type: Support
  url: https://github.com/eclipse/rdf4j/discussions
- type: GitHubOrganization
  url: https://github.com/eclipse/rdf4j
- type: License
  url: https://github.com/eclipse/rdf4j/blob/main/LICENSE.md
- type: Blog
  url: https://rdf4j.org/index.xml
maintainers:
- FN: Eclipse Foundation
  email: rdf4j-dev@eclipse.org

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