Leiden University website screenshot

Leiden University

Leiden University (Universiteit Leiden) is the oldest university in the Netherlands, founded in 1575, and ranks #141 in the QS World University Rankings 2025. Its public, machine-accessible developer footprint is modest and centered on its libraries rather than a central developer portal. Leiden University Libraries operates an OAI-PMH metadata harvesting endpoint for its Scholarly Publications repository and maintains an active open-source GitHub organization (LeidenUniversityLibrary) with library, Islandora, and IIIF tooling. There is no centrally documented public REST API program; most institutional and student systems are gated behind SSO.

Leiden University publishes 1 API on the APIs.io network. Tagged areas include Education, Higher Education, University, Netherlands, and Library.

The Leiden University catalog on APIs.io includes 1 JSON-LD context.

Leiden University’s developer surface includes GitHub presence and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
17.8/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
AccessFree
1 APIs
EducationHigher EducationUniversityNetherlandsLibraryOpen AccessOAI-PMHResearch

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 17.8/100 · emerging
Contract Quality 2.4 / 21
Developer Ergonomics 0.0 / 17
Access Clarity 4.9 / 17
Operational Transparency 2.9 / 11
Contract Governance 0.0 / 10
Discoverability 5.8 / 9
Regulatory Posture 3.1 / 15
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
Regulatory Posture applies to this provider. Its tags matched the Education & Research 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.
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/. This rating is computed from github.com/api-evangelist/leiden: 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 1

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

Scholarly Publications OAI-PMH

OAI-PMH 2.0 metadata harvesting endpoint for the Leiden University Scholarly Publications repository, an Islandora-based institutional repository providing open access to PhD th...

Pricing Plans 1

Published pricing tiers and plan structures.

Leiden Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Leiden Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Leiden Finops

FINOPS

Semantic Vocabularies 1

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

Leiden Context

22 classes · 5 properties

JSON-LD

Security Posture 1

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

Leiden Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

Website
Website
 LinkedIn
LinkedIn

Other 1

Properties that don't map to a standard resource type

Review
Review

Source (apis.yml)

apis.yml Raw ↑ 
aid: leiden
name: Leiden University
description: 'Leiden University (Universiteit Leiden) is the oldest university in the Netherlands, founded in 1575, and ranks
  #141 in the QS World University Rankings 2025. Its public, machine-accessible developer footprint is modest and centered
  on its libraries rather than a central developer portal. Leiden University Libraries operates an OAI-PMH metadata harvesting
  endpoint for its Scholarly Publications repository and maintains an active open-source GitHub organization (LeidenUniversityLibrary)
  with library, Islandora, and IIIF tooling. There is no centrally documented public REST API program; most institutional
  and student systems are gated behind SSO.'
type: Index
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/leiden.png
url: https://raw.githubusercontent.com/api-evangelist/leiden/refs/heads/main/apis.yml
tags:
- Education
- Higher Education
- University
- Netherlands
- Library
- Open Access
- OAI-PMH
- Research
created: '2026-06-03'
modified: '2026-06-03'
specificationVersion: '0.23'
apis:
- aid: leiden:scholarly-oai
  name: Scholarly Publications OAI-PMH
  description: OAI-PMH 2.0 metadata harvesting endpoint for the Leiden University Scholarly Publications repository, an Islandora-based
    institutional repository providing open access to PhD theses, articles, journals, book series, and conference proceedings
    since 2006. Metadata may be harvested free of charge by search engines and open access initiatives.
  humanURL: https://scholarlypublications.universiteitleiden.nl/about
  baseURL: https://scholarlypublications.universiteitleiden.nl/oai2
  tags:
  - OAI-PMH
  - Open Access
  - Repository
  - Metadata
  - Library
  properties:
  - type: Documentation
    url: https://scholarlypublications.universiteitleiden.nl/about
  - type: Authentication
    url: https://scholarlypublications.universiteitleiden.nl/oai2
common:
- type: DomainSecurity
  url: security/leiden-domain-security.yml
- type: Website
  url: https://www.universiteitleiden.nl/en
- type: GitHub
  url: https://github.com/LeidenUniversityLibrary
- type: LinkedIn
  url: https://www.linkedin.com/school/leiden-university/
- type: Plans
  url: plans/leiden-plans-pricing.yml
- type: RateLimits
  url: rate-limits/leiden-rate-limits.yml
- type: FinOps
  url: finops/leiden-finops.yml
- type: Review
  url: review.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com