Universität Hamburg

aid: universitat-hamburg
name: Universität Hamburg
x-type: university
x-category: Public Research University
description: 'Universität Hamburg is a public research university in Hamburg, Germany, and one of the largest in the country.
  It operates no central developer portal, publishes no OpenAPI of its own, and has no course, registrar, campus-life or open-data
  API — the STiNE campus-management system and the Katalogplus discovery service are both behind an authorization wall. What
  it does operate, on its own hosts and with its own engineering, is scholarly-communication and identity infrastructure:
  a research-data repository (ZFDM, www.fdr.uni-hamburg.de) whose read API returns unauthenticated JSON with CORS and rate-limit
  headers; five live OAI-PMH 2.0 repositories across dissertations, research data, the university press, its journal server
  and its digitized collections; and its own Shibboleth SAML 2.0 Identity Provider, whose metadata is published at login.uni-hamburg.de
  and registered in the DFN-AAI federation and thereby in eduGAIN. It is a DataCite registrant (prefix 10.25592) and its library
  is a Crossref member (prefix 10.15460). Almost all of this is library-and-computing-centre infrastructure rather than a
  product; none of it is documented for third-party developers.'
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: false
  callable_host: true
  label: Institution-operated endpoints · you call their host
  confidence: high
  source:
  - https://www.fdr.uni-hamburg.de/api/records/?size=1
  generated: '2026-09-01'
  method: probed
accessModel:
  pricing: free
  onboarding: none
  trial: false
  try_now: true
  public: true
  label: Free and open, no registration
  confidence: high
  source:
  - https://www.fdr.uni-hamburg.de/api/records/?size=1
  generated: '2026-09-01'
  method: probed
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/universitat-hamburg.png
url: https://raw.githubusercontent.com/api-evangelist/universitat-hamburg/refs/heads/main/apis.yml
tags:
- Education
- Higher Education
- University
- Germany
- Research Data
- Research Repository
- Library
- Open Access
- Metadata
- OAI-PMH
- Identity Federation
- DataCite
created: '2026-06-03'
modified: '2026-09-01'
specificationVersion: '0.23'
apis:
- aid: universitat-hamburg:zfdm-repository-api
  name: ZFDM Research Data Repository API
  x-operator: institution
  description: Read API of the ZFDM Repository (Forschungsdatenrepositorium), operated by Universität Hamburg's Zentrum für
    nachhaltiges Forschungsdatenmanagement on the institution's own host. Returns records, communities, licenses and file
    buckets as unauthenticated JSON with Access-Control-Allow-Origin *, RFC 8288 Link pagination and X-RateLimit-* headers
    (limit 5000). Deposit paths return 401. Records carry DataCite DOIs under the institutional prefix 10.25592 and ORCID
    iDs on creators. The repository runs Invenio, so the contract SHAPE originates upstream; the deployment, host, identifiers
    and data are the institution's, and the OpenAPI below was derived by API Evangelist from live probes because the institution
    publishes none.
  humanURL: https://www.fdr.uni-hamburg.de/
  baseURL: https://www.fdr.uni-hamburg.de/api
  tags:
  - Research Data
  - Repository
  - DataCite
  - DOI
  - Open Access
  - Invenio
  properties:
  - type: OpenAPI
    url: openapi/universitat-hamburg-zfdm-repository-openapi.yml
  - type: x-openapi-original
    url: openapi/_original/universitat-hamburg-zfdm-repository-openapi.yml
  - type: Authentication
    url: authentication/universitat-hamburg-authentication.yml
  - type: Errors
    url: errors/universitat-hamburg-errors.yml
  - type: Documentation
    url: https://www.fdr.uni-hamburg.de/
- aid: universitat-hamburg:zfdm-oai
  name: ZFDM Repository OAI-PMH
  x-operator: institution
  description: 'OAI-PMH 2.0 harvesting interface of the ZFDM Research Data Repository. Verified live 2026-09-01: repositoryName
    "ZFDM Repository", adminEmail repository.fdm@uni-hamburg.de, earliest datestamp 2019-04-03. Offers the datacite, datacite3,
    oai_datacite, oai_datacite3, marcxml, marc21 and oai_dc metadata prefixes.'
  humanURL: https://www.fdr.uni-hamburg.de/
  baseURL: https://www.fdr.uni-hamburg.de/oai2d
  tags:
  - OAI-PMH
  - Metadata
  - Research Data
  - DataCite
  - Harvesting
  properties:
  - type: APIReference
    url: https://www.fdr.uni-hamburg.de/oai2d?verb=Identify
  - type: Example
    url: examples/universitat-hamburg-zfdm-oai-identify-example.xml
  x-pointer-note: The bare OAI-PMH base URL returns HTTP 422 because the protocol requires a `verb` parameter; that is correct
    protocol behaviour, not a dead endpoint. The APIReference pointer above carries the verb and returns 200.
- aid: universitat-hamburg:ediss-oai
  name: E-Dissertationen (ediss.sub.hamburg) OAI-PMH
  x-operator: institution
  description: OAI-PMH 2.0 metadata-harvesting interface for the DSpace-based institutional repository of electronic dissertations
    and habilitations of Universität Hamburg, operated by the Staats- und Universitätsbibliothek Hamburg. Verified live 2026-09-01
    returning a valid Identify response and nine metadata prefixes including oai_datacite, xMetaDissPlus, epicur, marc and
    ore. The repository exposes no REST API — /rest and /server/api both return 404.
  humanURL: https://www.sub.uni-hamburg.de/service/publizieren/dissertationen/e-dissertationen-der-uhh.html
  baseURL: https://ediss.sub.uni-hamburg.de/oai/request
  tags:
  - Library
  - Repository
  - OAI-PMH
  - Metadata
  - DSpace
  - Open Access
  properties:
  - type: Documentation
    url: https://www.sub.uni-hamburg.de/service/publizieren/dissertationen/e-dissertationen-der-uhh.html
- aid: universitat-hamburg:hup-oai
  name: Hamburg University Press OAI-PMH
  x-operator: institution
  description: OAI-PMH 2.0 interface of Hamburg University Press, the open-access publishing house of the Staats- und Universitätsbibliothek
    Hamburg, running on OJS. Verified live 2026-09-01 with 15 sets and the oai_dc, xMetaDissPlus and epicur metadata prefixes.
    The OJS REST API (/api/v1/) is not exposed — it returns HTTP 500 unauthenticated.
  humanURL: https://hup.sub.uni-hamburg.de/
  baseURL: https://hup.sub.uni-hamburg.de/index.php/index/oai
  tags:
  - OAI-PMH
  - Open Access
  - Publishing
  - Metadata
  - OJS
- aid: universitat-hamburg:journals-oai
  name: HUP Journal Server OAI-PMH
  x-operator: institution
  description: 'OAI-PMH 2.0 interface of the journal server of Hamburg University Press. Verified live 2026-09-01: repositoryName
    "Journal Server of Hamburg University Press - Publishing House of the State and University Library Hamburg Carl von Ossietzky",
    earliest datestamp 2014-02-10, 100+ sets.'
  humanURL: https://journals.sub.uni-hamburg.de/
  baseURL: https://journals.sub.uni-hamburg.de/index.php/index/oai
  tags:
  - OAI-PMH
  - Open Access
  - Journals
  - Metadata
  - OJS
- aid: universitat-hamburg:digitalisate-oai
  name: Digitized Collections (Kitodo.Presentation) OAI-PMH
  x-operator: institution
  description: 'OAI-PMH 2.0 interface over the digitized collections of the Staats- und Universitätsbibliothek Hamburg, running
    Kitodo.Presentation. Verified live 2026-09-01 serving real PPN identifiers with the oai_dc, epicur and mets metadata prefixes.
    Caveat recorded rather than smoothed over: the Identify block still carries the software''s default adminEmail (unknown@example.org),
    so the endpoint is live but not fully configured.'
  humanURL: https://digitalisate.sub.uni-hamburg.de/
  baseURL: https://digitalisate.sub.uni-hamburg.de/oai
  tags:
  - OAI-PMH
  - Digitization
  - METS
  - Library
  - Metadata
  - Kitodo
- aid: universitat-hamburg:saml-idp
  name: Universität Hamburg Shibboleth SAML 2.0 Identity Provider Metadata
  x-operator: institution
  description: The institution's own SAML 2.0 Identity Provider metadata, served from its own host. entityID https://login.uni-hamburg.de/idp/shibboleth,
    mdui:DisplayName "Universität Hamburg (UHH)", three SingleSignOnService endpoints across HTTP-POST, HTTP-POST-SimpleSign,
    HTTP-Redirect and SOAP bindings. Operated by the Regionales Rechenzentrum (RRZ). This is the institution's single strongest
    machine-readable, institution-engineered surface — and the class the university cohort was most completely missing.
  humanURL: https://www.rrz.uni-hamburg.de/services/weitere/authentifizierung/shibboleth/configure.html
  baseURL: https://login.uni-hamburg.de/idp/shibboleth
  tags:
  - Identity Federation
  - SAML
  - Shibboleth
  - Single Sign-On
  - Metadata
  properties:
  - type: Example
    url: examples/universitat-hamburg-saml-idp-metadata-example.xml
  - type: Documentation
    url: https://www.rrz.uni-hamburg.de/services/weitere/authentifizierung/shibboleth/configure.html
- aid: universitat-hamburg:dfn-aai
  name: DFN-AAI / eduGAIN Federation Membership
  x-operator: federation
  description: Universität Hamburg's IdP is registered in DFN-AAI, the German national identity federation and eduGAIN member,
    and its metadata is resolvable through the DFN-AAI MDQ service. registrationAuthority https://www.aai.dfn.de. The entity
    asserts support for the REFEDS Research & Scholarship entity category and the GÉANT Data Protection Code of Conduct v1.
    A federation is shared by definition; the IdP behind this entry is the institution's own, which is why the relationship
    is recorded rather than dropped as a shared host.
  humanURL: https://www.aai.dfn.de/
  baseURL: https://mdq.aai.dfn.de/entities/https%3A%2F%2Flogin.uni-hamburg.de%2Fidp%2Fshibboleth
  tags:
  - Identity Federation
  - SAML
  - eduGAIN
  - DFN-AAI
  - Metadata
- aid: universitat-hamburg:datacite-registrant
  name: DataCite Registrant (prefix 10.25592)
  x-operator: registry
  description: Universität Hamburg is a DataCite registrant. DOI prefix 10.25592 resolves to DataCite client tib.fdmuh, named
    "Universität Hamburg", registered 2017 and used by the ZFDM Repository. The university library is a second registrant,
    client zbw.subhh, "Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky", registered 2016. The contract at api.datacite.org
    is DataCite's, not the institution's; what is recorded here is the membership, which is a fact about Universität Hamburg.
  humanURL: https://www.fdr.uni-hamburg.de/
  baseURL: https://api.datacite.org/clients/tib.fdmuh
  x-pointer-note: The DataCite Commons page for this registrant (https://commons.datacite.org/repositories/tib.fdmuh) rate-limits
    automated probes with HTTP 429 and is therefore not emitted as a pointer; the registrant record itself is verified through
    the DataCite API URL above.
  tags:
  - DataCite
  - DOI
  - Registry
  - Persistent Identifiers
  - Research Data
- aid: universitat-hamburg:crossref-member
  name: Crossref Member 25426 (prefix 10.15460)
  x-operator: registry
  description: The Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky — the university library and publisher of
    Hamburg University Press — is Crossref member 25426, depositing under prefix 10.15460, with 3,954 DOIs on record as of
    2026-09-01. Membership recorded; the Crossref API contract is Crossref's.
  humanURL: https://www.crossref.org/
  baseURL: https://api.crossref.org/members/25426
  tags:
  - Crossref
  - DOI
  - Registry
  - Persistent Identifiers
  - Publishing
- aid: universitat-hamburg:ror
  name: ROR Registration (00g30e956)
  x-operator: registry
  description: Universität Hamburg is registered in the Research Organization Registry as https://ror.org/00g30e956. Membership
    recorded; the ROR API is ROR's.
  humanURL: https://ror.org/00g30e956
  baseURL: https://api.ror.org/v2/organizations/00g30e956
  tags:
  - ROR
  - Registry
  - Persistent Identifiers
  - Organization Identifier
- aid: universitat-hamburg:open-access-portal
  name: Open-Access-Portal Universität Hamburg
  x-operator: institution
  description: Open Access discovery portal aggregating freely available publications, research data, teaching materials and
    scientific collections of Universität Hamburg. Human-facing only — no documented REST API. Indexed here because it is
    the institution's own front door to the harvestable metadata infrastructure catalogued above.
  humanURL: https://www.openaccess.uni-hamburg.de/en.html
  tags:
  - Open Access
  - Repository
  - Metadata
  - Research Data
  properties:
  - type: Documentation
    url: https://www.openaccess.uni-hamburg.de/en.html
common:
- type: Website
  url: https://www.uni-hamburg.de/en.html
- type: Blog
  url: https://www.uni-hamburg.de/en/newsroom.html
- type: TermsOfService
  url: https://www.uni-hamburg.de/en/impressum.html
- type: PrivacyPolicy
  url: https://www.uni-hamburg.de/en/datenschutz.html
- type: Support
  url: https://www.uni-hamburg.de/en/uhh/kontakt.html
- type: GitHubOrganization
  url: https://github.com/Uni-Hamburg
- type: SourceCode
  url: https://github.com/subhh
- type: SourceCode
  url: https://gitlab.rrz.uni-hamburg.de/
- type: LinkedIn
  url: https://www.linkedin.com/school/universitaet-hamburg/
- type: ResearchRepository
  url: https://www.fdr.uni-hamburg.de/
- type: LibraryCatalog
  url: https://kataloge.uni-hamburg.de/
- type: CourseCatalog
  url: https://www.stine.uni-hamburg.de/
- type: IdentityFederation
  url: https://login.uni-hamburg.de/idp/shibboleth
- type: ResearchComputing
  url: https://www.rrz.uni-hamburg.de/en/services/hpc.html
- type: AIPolicy
  url: https://www.uni-hamburg.de/lehre-navi/lehrende/orientierungsrahmen-gki
- type: Authentication
  url: https://www.rrz.uni-hamburg.de/services/weitere/authentifizierung/shibboleth/configure.html
- type: Conformance
  url: conformance/universitat-hamburg-conformance.yml
- type: DomainSecurity
  url: security/universitat-hamburg-domain-security.yml
- type: Plans
  url: plans/universitat-hamburg-plans-pricing.yml
- type: RateLimits
  url: rate-limits/universitat-hamburg-rate-limits.yml
- type: FinOps
  url: finops/universitat-hamburg-finops.yml
- type: Review
  url: review.yml
x-coverage:
  state: covered
  reason: covered
  detail: 'Re-profiled 2026-09-01 under the university pipeline. Eleven surfaces settled on the operator axis: eight institution-operated,
    one federation, three registry (DataCite counted once across two registrant clients). The substantive find is that Universität
    Hamburg does operate real institution-engineered machine-readable surfaces — a live unauthenticated JSON research-data
    API, five OAI-PMH 2.0 repositories, and its own Shibboleth SAML 2.0 IdP registered in DFN-AAI/eduGAIN — none of which
    were catalogued in the June 2026 profile, which held only two entries. No vendor contract was saved and none was found
    in the repo to remove: the audit''s verdict counts were {"institution": 2} with no tenant, hostless, shared-contract or
    misbased findings. What is genuinely absent is a developer-facing footprint: no developer portal, no institution-published
    OpenAPI, no /llms.txt, no /.well-known/security.txt, no OAuth server, no course or open-data API. Two plausible surfaces
    were probed and REJECTED as dead rather than counted: katalogplus.sub.uni-hamburg.de returns an identical 1,989-byte "SUBHHCore
    Authorization" page on every path including /api/v1/, and kataloge.uni-hamburg.de returns its cookie-consent shell for
    /api/v1/search and /OAI/Server alike. One surface was rejected as another institution''s: the OGC API - Features service
    at api.hamburg.de belongs to the Freie und Hansestadt Hamburg''s Urban Data Platform, not to the university, and is not
    recorded here.'
  evidence:
  - url: https://www.fdr.uni-hamburg.de/api/records/?size=1&sort=mostrecent
    status: 200
  - url: https://www.fdr.uni-hamburg.de/api/records/999999999
    status: 404
  - url: https://www.fdr.uni-hamburg.de/api/deposit/depositions
    status: 401
  - url: https://www.fdr.uni-hamburg.de/oai2d?verb=Identify
    status: 200
  - url: https://ediss.sub.uni-hamburg.de/oai/request?verb=Identify
    status: 200
  - url: https://hup.sub.uni-hamburg.de/index.php/index/oai?verb=Identify
    status: 200
  - url: https://journals.sub.uni-hamburg.de/index.php/index/oai?verb=Identify
    status: 200
  - url: https://digitalisate.sub.uni-hamburg.de/oai?verb=Identify
    status: 200
  - url: https://login.uni-hamburg.de/idp/shibboleth
    status: 200
  - url: https://mdq.aai.dfn.de/entities/https%3A%2F%2Flogin.uni-hamburg.de%2Fidp%2Fshibboleth
    status: 200
  - url: https://api.datacite.org/prefixes/10.25592
    status: 200
  - url: https://api.crossref.org/members/25426
    status: 200
  - url: https://ror.org/00g30e956
    status: 200
  - url: https://katalogplus.sub.uni-hamburg.de/vufind/api/v1/search?lookfor=hamburg&limit=1
    status: 200
    note: Soft-200 — identical 1,989-byte authorization shell, not an API.
  - url: https://kataloge.uni-hamburg.de/api/v1/search?lookfor=test&limit=1
    status: 200
    note: Soft-200 — cookie-consent HTML shell, not an API.
  - url: https://www.uni-hamburg.de/llms.txt
    status: 404
  - url: https://www.uni-hamburg.de/.well-known/security.txt
    status: 404
  - url: https://ediss.sub.uni-hamburg.de/server/api
    status: 404
    note: No DSpace 7 REST API; /rest also 404.
x-enrichment:
  pipeline: pipeline-university
  generated: '2026-09-01'
  method: probed
  note: Operator axis settled before any contract was saved. The only OpenAPI in this repo was derived by API Evangelist from
    live probes of an institution-operated host; the institution publishes none.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com