generated: '2026-09-01'
method: derived
authorship: API Evangelist
probe_basis: live probe sweep of Keio University surfaces, 2026-09-01
source: >-
  Live probes on 2026-09-01, plus dated registry records (DataCite provider `keio` created
  2025-03-11; GakuNin registrationInstant 2014-02-24T10:22:10Z) and the Keio Media Center's own
  public announcements of KOARA (2006) and IIIF conformance (April 2017).
provider: Keio University
providerId: keio
description: >-
  Lifecycle posture for Keio University's public API surfaces. The honest summary is that Keio
  operates long-lived, stable interfaces and manages none of them as a product: there is no
  versioning policy, no changelog, no deprecation notice, no status page and no announcement
  channel for any of them. Stability here comes from inertia rather than from commitment — which is
  a genuinely useful thing for a consumer to know, and is different from either a managed API or an
  abandoned one.

surfaces:
  - name: KOARA OAI-PMH Metadata API
    x-operator: institution
    status: production
    first_available: '2006'
    first_available_note: KOARA was released by the Keio University Media Center in 2006 on the XooNips platform.
    versioning: >-
      Protocol versioning only. The interface declares OAI-PMH protocolVersion 2.0; there is no
      Keio-side API version, no version in the path and no content negotiation beyond the
      metadataPrefix parameter.
    version_observed: '2.0'
    breaking_change_policy: none published
    deprecation_policy: none published
    changelog: none
    status_page: none
    stability_signal: >-
      Record datestamps in the repository run from 2009 through 2022 in the sample harvested,
      indicating continuous operation. The endpoint responded to all six probed verbs on
      2026-09-01.
    risk: >-
      The underlying repository software, XooNips, is a long-dormant Japanese research project.
      A platform migration would be the realistic source of a breaking change, and there is no
      channel on which such a migration would be announced to harvesters.

  - name: Keio Media Center Digital Collections IIIF APIs
    x-operator: institution
    status: production
    first_available: '2017-04'
    first_available_note: >-
      The Media Center announced IIIF conformance for its Digital Collections in April 2017,
      reported by the National Diet Library's Current Awareness Portal.
    versioning: >-
      Specification versioning only — Presentation API 2.1 and Image API 2.0 Level 1, declared
      through the `@context` and `profile` values in each response. Keio has not migrated to IIIF
      Presentation 3.0; consumers written against v3 will not work without a v2 code path.
    version_observed: 'Presentation 2 / Image 2, level1'
    breaking_change_policy: none published
    deprecation_policy: none published
    changelog: none
    status_page: none
    stability_signal: >-
      Manifests and image tiles both served on 2026-09-01, nine years after launch, on the original
      v2 contexts. The Drupal front end is current (Drupal 10.4.3), so the site is actively
      maintained even though the IIIF version has not moved.
    risk: >-
      Archive codes are not published anywhere. A consumer can only discover a manifest URL by
      resolving it from the site's HTML, so any change to the site's markup or URL structure breaks
      discovery silently.

  - name: GakuNin / eduGAIN identity provider
    x-operator: institution
    status: production
    registered: '2014-02-24T10:22:10Z'
    versioning: SAML 2.0; metadata refreshed through GakuNin's aggregate rather than versioned by Keio.
    deprecation_policy: Governed by GakuNin's federation participation policy, not by Keio.
    changelog: GakuNin metadata aggregate carries registrationInstant; no per-entity changelog.
    stability_signal: Continuously registered for over twelve years.
    open_defect: >-
      The entityID host gakunin1.keio.ac.jp presents an expired TLS certificate. It does not break
      federation, but it is an unattended-maintenance signal on the host that carries the
      institution's federated identity.

  - name: DataCite membership (provider `keio`)
    x-operator: registry
    status: new and barely used
    joined: '2025-03-11'
    detail: >-
      Registered 2025-03-11 as a consortium organisation under the Figshare (FSCO) consortium with
      prefix 10.71825. Five DOIs minted as of 2026-09-01. Recorded at its real size rather than
      described as a research-data programme.

estate_wide:
  developer_communication: none
  detail: >-
    Across every probed host, Keio publishes no changelog, no status page, no API announcement
    feed, no deprecation notice, no terms of use for machine access and no security.txt
    (https://www.keio.ac.jp/.well-known/security.txt returns a real 404). A consumer of these APIs
    learns about a change by the change happening.