---
name: University of Tübingen
description: University of Tübingen public developer/API footprint review for APIs.json cataloging.
url: https://raw.githubusercontent.com/api-evangelist/university-of-tubingen/refs/heads/main/review.yml
created: '2026-06-03'
modified: '2026-09-01'
reviews:
  - date: '2026-09-01'
    rating: 3
    summary: >-
      University pipeline re-profile with operator attribution. The June 2026 review found
      two surfaces, both FDAT. Three more institution-operated surfaces were found this run
      and all five were re-probed live: (1) a second, far older OAI-PMH provider for the
      University Library's TOBIAS-lib DSpace publication server at
      publikationen.uni-tuebingen.de/oai/request, with records back to 1998-12-16 and the
      German xMetaDissPlus dissertation profile — missed entirely in June; (2) the
      university's own Shibboleth SAML 2.0 identity provider, entityID
      https://idp.uni-tuebingen.de/shibboleth, registered in DFN-AAI since 2009-05-26,
      exported to eduGAIN, asserting REFEDS R&S and SIRTFI/SIRTFI2 and holding its own key
      (CN=idp.uni-tuebingen.de, OU=ZDV) — the strongest institution-operated machine
      surface here and the class universities are most often missing from the catalog;
      (3) TueFind, the library's own VuFind derivative developed in the open at
      github.com/ubtue/tuefind and running ixTheo, RelBib and KrimDok, currently behind a
      SHA-256 proof-of-work browser challenge on every path. Two registry memberships were
      evidenced and recorded as memberships rather than contracts: DataCite (member AWZY
      "IKM Universität Tübingen", repository client AWZY.FEDNNV, DOI prefix 10.57754,
      re3data r3d100012296) and ROR (03a1kwz48). One tenant relationship was recorded: the
      library catalogue on the IBS|BW consortium platform. No OpenAPI, developer portal,
      llms.txt, .well-known document or key issuance exists, and none was generated — the
      InvenioRDM, DSpace and VuFind contracts belong to their upstream projects, not to
      Tübingen. Rate limits are now probed fact rather than prose: X-RateLimit-Limit 500,
      Retry-After 60 on the FDAT API.
    endpoints:
      - url: https://fdat.uni-tuebingen.de/api/records?size=1
        status: 200
        note: Keyless InvenioRDM REST API, 437 published records, faceted aggregations.
      - url: https://fdat.uni-tuebingen.de/api/records/zvknn-g0x34
        status: 200
        note: >-
          Record document with DataCite DOI 10.57754/FDAT.zvknn-g0x34, typed ORCID creator
          identifiers, IIIF manifest links, ETag and X-RateLimit-Limit 500.
      - url: https://publikationen.uni-tuebingen.de/oai/request?verb=Identify
        status: 200
        note: >-
          NEW — "Publikationssystem UB Tuebingen" DSpace OAI-PMH, adminEmail
          edl-admin@ub.uni-tuebingen.de, earliestDatestamp 1998-12-16.
      - url: https://mdq.aai.dfn.de/entities/https%3A%2F%2Fidp.uni-tuebingen.de%2Fshibboleth
        status: 200
        note: >-
          NEW — DFN-AAI MDQ returns a real 21,696-byte EntityDescriptor for the university's
          Shibboleth IdP. The similar entityID .../idp/shibboleth returns a signed but EMPTY
          7,750-byte wrapper, also HTTP 200 — a soft-200 that must not be read as a find.
      - url: https://api.datacite.org/clients/awzy.fednnv
        status: 200
        note: NEW — DataCite repository client FDAT under member AWZY, ROR-linked to 03a1kwz48.
      - url: https://ixtheo.de/api/v1/search?lookfor=test
        status: 200
        note: >-
          Live but bot-challenged — a 2,148-byte SHA-256 proof-of-work interstitial branded with
          University of Tübingen and University Library logos, served for every path. Not defeated.
      - url: https://katalog.ub.uni-tuebingen.de/
        status: 403
        note: 301s to rds-tue.ibs-bw.de/opac/ — IBS|BW consortium platform, recorded as tenant.
      - url: https://data.uni-tuebingen.de/
        status: 0
        note: Does not resolve. No open data portal exists; opendata. and api. also do not resolve.
  - date: '2026-06-03'
    rating: 2
    summary: >-
      No central developer portal or published API documentation hub was found.
      The verifiable, publicly documented API footprint is the FDAT
      institutional research data repository (InvenioRDM), which exposes a live
      JSON REST API and an OAI-PMH 2.0 endpoint, both returning HTTP 200 and
      confirmed live. Central systems referenced on the website (ALMA student
      information, ILIAS, Moodle, FIT research information system, TIMMS video
      portal) are gated and have no public API docs, so none were cataloged to
      avoid fabrication. Multiple verified GitHub organizations publish source
      code but not consumer-facing web APIs. Library catalog (Alma/Primo) and
      SSO endpoints were not confirmed to have public, documented APIs.
    endpoints:
      - url: https://uni-tuebingen.de/en/
        status: 200
        note: Official English homepage; no developer/API portal linked.
      - url: https://fdat.uni-tuebingen.de
        status: 200
        note: FDAT research data repository (InvenioRDM), Digital Humanities Center.
      - url: https://fdat.uni-tuebingen.de/api/records
        status: 200
        note: Live InvenioRDM JSON REST API returning record hits.
      - url: https://fdat.uni-tuebingen.de/oai2d?verb=Identify
        status: 200
        note: Live OAI-PMH 2.0 endpoint; admin fdat@dh-center.uni-tuebingen.de.
      - url: https://github.com/ubtue
        status: 200
        note: Tübingen University Library GitHub org, 48 public repos.
      - url: https://github.com/se-tuebingen
        status: 200
        note: Software Engineering GitHub org, source code only.
      - url: https://www.linkedin.com/company/university-of-tuebingen
        status: 200
        note: Official LinkedIn company page.