Tianjin University

aid: tianjin
name: Tianjin University
description: 'Tianjin University (天津大学, TJU) is a national public research university in Tianjin, China, founded in 1895 as
  Peiyang University and recognised as the oldest modern university in the country. It publishes no public API, no developer
  portal, no open data portal and no specification of any kind: www.tju.edu.cn returns 404 for robots.txt, llms.txt, .well-known/security.txt
  and .well-known/openid-configuration, and api., data., open., developer. and dev.tju.edu.cn do not resolve. What it does
  operate — and this is the finding that separates it from most of this cohort — is its own Shibboleth SAML 2.0 identity provider
  at idp.tju.edu.cn, on the university''s own CERNET address with no vendor CNAME, registered as entity 671640 in CARSI, China''s
  national research-and-education identity federation, and visible in eduGAIN since October 2019. Its metadata document is
  credential-free, machine-readable and genuinely the institution''s own engineering rather than a vendor''s contract running
  under the university''s name. Beyond that the estate is a set of relationships and gated systems: a Crossref membership
  with its own DOI prefix but only eleven registered DOIs, a ROR registration, a library discovery front end that answers
  only an SPA shell, and an institutional repository, OPAC and campus portal that resolve into TJU''s own address block but
  redirect every off-campus request to a soft-403 network notice. There is no DataCite membership and no reachable OAI-PMH
  endpoint.'
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
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: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/tianjin.png
url: https://raw.githubusercontent.com/api-evangelist/tianjin/refs/heads/main/apis.yml
x-type: university
x-category: Public Research University
x-api-posture: no-product-api
x-api-posture-basis: observed
x-api-posture-note: No public API documentation, base URL, key issuance or sign-up flow exists on any tju.edu.cn host. The
  one credential-free machine-readable document the university serves is SAML 2.0 federation metadata for its own identity
  provider — institutional infrastructure, not a product API, and it is recorded as such.
tags:
- Education
- Higher Education
- University
- Research
- China
- Tianjin
- Double First Class
- Project 985
- Identity Federation
- Shibboleth
- SAML
- Single Sign-On
- Library
- Research Repository
- Persistent Identifiers
created: '2026-06-03'
modified: '2026-09-01'
specificationVersion: '0.23'
apis:
- aid: tianjin:shibboleth-idp
  name: Tianjin University Shibboleth Identity Provider (SAML 2.0 metadata)
  description: 'The university''s own Shibboleth identity provider, and the only credential-free, machine-readable contract
    anywhere in this profile. https://idp.tju.edu.cn/idp/shibboleth returns HTTP 200 and 14,410 bytes of SAML 2.0 metadata
    describing an IDPSSODescriptor and an AttributeAuthorityDescriptor, twelve X.509 certificates, and single sign-on, single
    logout, attribute query and artifact resolution endpoints across the Redirect, POST, POST-SimpleSign and SOAP bindings,
    plus the Shibboleth-specific urn:mace:shibboleth:1.0 AuthnRequest profile and shibmd:Scope extensions scoped to idp.tju.edu.cn.
    The deployment''s own error pages are branded 天津大学CARSI Idp. Two honest caveats: the served document still carries Shibboleth''s
    installer boilerplate ("This is example metadata only", mdui:DisplayName "A Name for the IdP at idp.tju.edu.cn"), which
    is a hygiene observation and not a reason to doubt the entity; and there is no OpenID Connect surface alongside it — /.well-known/openid-configuration
    and /idp/profile/oidc/keyset both return 404.'
  humanURL: https://idp.tju.edu.cn/idp/
  baseURL: https://idp.tju.edu.cn/idp/
  tags:
  - Identity Federation
  - Shibboleth
  - SAML
  - Single Sign-On
  - Authentication
  - Education
  properties:
  - type: IdentityFederation
    url: identity-federation/tianjin-identity-federation.yml
  - type: Metadata
    url: identity-federation/tianjin-idp-saml-metadata.xml
  - type: Authentication
    url: authentication/tianjin-authentication.yml
  - type: Conformance
    url: conformance/tianjin-conformance.yml
  x-operator: institution
  x-operator-basis: 'idp.tju.edu.cn resolves to 202.113.2.198 — the same address as www.tju.edu.cn and en.tju.edu.cn — inside
    CERNET''s BJR-CERNET allocation, with no CNAME to any vendor. Every endpoint in the metadata, including the :8443 back-channel
    services, is on that host. Shibboleth is open-source software the institution deploys itself, not a hosted platform, so
    there is no vendor tenancy here: the contract, the keys and the endpoints are Tianjin University''s own.'
- aid: tianjin:carsi-edugain
  name: CARSI / eduGAIN Federation Registration (entity 671640)
  description: 'The same identity provider seen from the federation side. Tianjin University''s IdP is registered in CARSI
    — the CERNET Authentication and Resource Sharing Infrastructure, registration authority https://www.carsi.edu.cn, an eduGAIN
    member federation since May 2019 and in production since June 2019 — as eduGAIN entity 671640, first seen 2019-10-31,
    scope idp.tju.edu.cn, with both IDPSSODescriptor and AttributeAuthorityDescriptor roles and display names "Tianjin University"
    / 天津大学(Tianjin University). This is what makes the IdP usable for federated access to licensed library and publisher resources.
    Disambiguated against two same-city lookalikes registered in the same federation: idp.tjufe.edu.cn is Tianjin University
    of Finance and Economics and idp.tjut.edu.cn is Tianjin University of Technology; neither is recorded here.'
  humanURL: https://www.carsi.edu.cn/
  baseURL: https://technical.edugain.org/api.php?action=list_entities&format=json&fed_id=CARSI
  tags:
  - Identity Federation
  - eduGAIN
  - CARSI
  - SAML
  - Registry
  properties:
  - type: IdentityFederation
    url: identity-federation/tianjin-identity-federation.yml
  - type: Registry
    url: https://technical.edugain.org/api.php?action=list_entities&format=json&fed_id=CARSI
  - type: Conformance
    url: conformance/tianjin-conformance.yml
  x-operator: federation
  x-operator-basis: An identity federation is shared by definition — 725 entities are registered in CARSI — and the entry
    within it carries Tianjin University's own IdP, scope, display names and roles. CERNET/CARSI operates the registry; the
    identity behind entity 671640 is the institution's. Per the university pipeline contract, the federation's own specification
    is not saved here and the relationship is not deleted for being shared.
- aid: tianjin:crossref
  name: Crossref Membership (member 34483, prefix 10.55582)
  description: 'Tianjin University is a Crossref member in its own right — member id 34483, DOI prefix 10.55582 — and is also
    present in the Crossref Open Funder Registry under funder ids 501100004517 and 501100015644. The scale is worth stating
    plainly rather than rounding up: the member record reports 11 total DOIs, all backfile, none current. TJU registers no
    DOIs with DataCite; a query of both the DataCite providers and clients endpoints returns meta.total = 0.'
  humanURL: https://www.crossref.org/
  baseURL: https://api.crossref.org/members/34483
  tags:
  - DOI
  - Persistent Identifiers
  - Scholarly Publishing
  - Registry
  properties:
  - type: Registry
    url: https://api.crossref.org/members/34483
  - type: Conformance
    url: conformance/tianjin-conformance.yml
  x-operator: registry
  x-operator-basis: An identifier registry the institution is registered in. api.crossref.org is shared because DOI registration
    is shared; member record 34483 and prefix 10.55582 name Tianjin University specifically. The registry's contract is Crossref's
    and is not saved here; the membership is a fact about the institution and is not deleted.
- aid: tianjin:ror
  name: ROR Registration (https://ror.org/012tb2g32)
  description: Tianjin University's Research Organization Registry record — the canonical machine-readable identifier for
    the institution as an entity, and the join key the other registries in this profile resolve against. It carries the English
    and Chinese names, the alias Peiyang University, the acronym TJU, the domain tju.edu.cn, established 1895, GRID grid.33763.32,
    ISNI 0000 0004 1761 2484, Wikidata Q2031560, Crossref Funder ids 501100004517 and 501100015644, and four child organisations
    (three State Key Laboratories and the Collaborative Innovation Center of Chemical Science and Engineering Tianjin).
  humanURL: https://ror.org/012tb2g32
  baseURL: https://api.ror.org/v2/organizations/012tb2g32
  tags:
  - Persistent Identifiers
  - Organization Identifiers
  - Registry
  properties:
  - type: Registry
    url: https://api.ror.org/v2/organizations/012tb2g32
  x-operator: registry
  x-operator-basis: An organisation registry the institution is registered in. ROR operates the API; the record describes
    Tianjin University.
- aid: tianjin:library-discovery
  name: TJU Library Unified Discovery (统一检索)
  description: 'The library''s unified discovery front end at find.lib.tju.edu.cn, reachable from outside the campus network
    and serving a real single-page application titled 统一检索. It publishes no machine-readable contract: /api/, /api/search
    and /search all return HTTP 200 with the same 1,129-byte SPA shell rather than JSON, so there is nothing here that can
    be promoted to a contract. Recorded as an institution-operated surface with no institution-published interface. The library''s
    main site is a separate host, home.lib.tju.edu.cn.'
  humanURL: https://find.lib.tju.edu.cn/
  tags:
  - Library
  - Discovery
  - Catalog
  - Education
  properties:
  - type: LibraryCatalog
    url: https://find.lib.tju.edu.cn/
  - type: Website
    url: https://home.lib.tju.edu.cn/
  x-operator: institution
  x-operator-basis: find.lib.tju.edu.cn and home.lib.tju.edu.cn both resolve to 202.113.2.196, in the university's own CERNET
    block, with no CNAME to any discovery vendor and no vendor name, contact or account identifier exposed in the served HTML.
    The underlying discovery software may well be a purchased product, but nothing published states so, and there is no contract
    to attribute either way — so this is recorded as an institution-operated surface, not as a tenancy we cannot evidence.
- aid: tianjin:campus-gated-systems
  name: Campus-Network-Gated Systems (repository, OPAC, portal)
  description: 'Three university systems resolve into TJU''s own address block but are unreachable from outside the campus
    network: the institutional repository ir.lib.tju.edu.cn and the library OPAC opac.lib.tju.edu.cn (both 202.113.2.196)
    and the campus portal portal.tju.edu.cn (202.113.2.198). Every off-campus request to any of them is transparently redirected
    to http://network-notice.tju.edu.cn/, which serves a page titled "403" under HTTP status 200 — a soft-403 access control,
    not an outage. Four standard OAI-PMH paths were probed against the repository and all four hit the same gate. This is
    recorded as an institution-operated surface whose contract, if one exists, cannot be read from here; the previous profile''s
    ProductPage pointer at opac.lib.tju.edu.cn has been removed because it grades as a live 200 while returning a 403 notice.'
  humanURL: https://home.lib.tju.edu.cn/
  tags:
  - Research Repository
  - Institutional Repository
  - Library
  - Restricted
  - Education
  properties:
  - type: Website
    url: https://home.lib.tju.edu.cn/
  - type: Authentication
    url: authentication/tianjin-authentication.yml
  x-operator: institution
  x-operator-basis: All three hosts sit in Tianjin University's own 202.113.2.0/24 CERNET allocation with no CNAME, and the
    interceptor itself, network-notice.tju.edu.cn, is a university host. The gate is the institution's own network policy.
common:
- type: Website
  url: https://en.tju.edu.cn/
- type: IdentityFederation
  url: identity-federation/tianjin-identity-federation.yml
- type: Authentication
  url: authentication/tianjin-authentication.yml
- type: Conformance
  url: conformance/tianjin-conformance.yml
- type: LibraryCatalog
  url: https://find.lib.tju.edu.cn/
- type: Blog
  url: https://news.tju.edu.cn/
- type: GitHub
  url: https://github.com/TJUBlockchainLab
- type: LinkedIn
  url: https://cn.linkedin.com/school/tianjinuniversity/
- type: DomainSecurity
  url: security/tianjin-domain-security.yml
- type: Plans
  url: plans/tianjin-plans-pricing.yml
- type: RateLimits
  url: rate-limits/tianjin-rate-limits.yml
- type: FinOps
  url: finops/tianjin-finops.yml
- type: Review
  url: review.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-coverage:
  state: covered
  reason: covered
  detail: 'One genuinely institution-operated, machine-readable surface was found, probed and recorded: Tianjin University''s
    own Shibboleth SAML 2.0 identity provider at idp.tju.edu.cn, serving 14,410 bytes of credential-free metadata over HTTP
    200, registered as eduGAIN entity 671640 in the CARSI federation since October 2019. That is the class this pipeline exists
    to find and it is the class the June 2026 cohort was most completely missing. It is institution-operated by every available
    signal — 202.113.2.198 in CERNET''s BJR-CERNET block, the same address as the university''s own web hosts, no CNAME, Shibboleth-specific
    protocol extensions, and the deployment''s own 天津大学CARSI Idp branding.

    Three relationships are recorded rather than contracts: the CARSI/eduGAIN registration (federation), a Crossref membership
    with prefix 10.55582 (registry), and the ROR registration 012tb2g32 (registry). None of their specifications is saved
    here and none of the relationships was deleted. The Crossref footprint is small and is stated as such — 11 DOIs, all backfile.

    What genuinely does not exist: no developer portal, no open data portal, no OpenAPI or any other specification published
    by the university, no OAuth or OIDC authorization server, no self-service registration, no published rate limits, no DataCite
    membership (providers and clients both return meta.total = 0), and no OpenID Connect alongside the SAML IdP. api., data.,
    open., developer., dev., hpc. and scc.tju.edu.cn do not resolve at all.

    What exists but cannot be read from outside China''s campus network: the institutional repository ir.lib.tju.edu.cn, the
    OPAC opac.lib.tju.edu.cn and the portal portal.tju.edu.cn, all of which resolve into TJU''s own address block and are
    transparently redirected to network-notice.tju.edu.cn, which serves a page titled "403" under HTTP 200. Four OAI-PMH paths
    were probed against the repository and all four hit that gate, so oai-pmh is recorded as not found from our vantage point
    rather than as absent. The library''s reachable discovery front end at find.lib.tju.edu.cn answers every path with the
    same SPA shell and publishes no contract.

    Two corrections were made to the previous profile. The ProductPage pointer at opac.lib.tju.edu.cn was removed: it grades
    as a live HTTP 200 while actually returning the network gate''s 403 notice. And a Chinese-language AI-governance document
    the graduate school issued — 《关于规范研究生学位论文与实践成果使用人工智能工具的倡议书》 — was located in search results but its published URL (gs.tju.edu.cn/info/1023/4816.htm)
    returns HTTP 404 over both HTTP and HTTPS while sibling pages on the same host return 200, so no AIPolicy pointer was
    emitted rather than emitting a dead one. Searches were run in Chinese as well as English.'
  assessed: '2026-09-01'
  method: probed
  evidence:
  - url: https://idp.tju.edu.cn/idp/shibboleth
    status: 200
  - url: https://idp.tju.edu.cn/
    status: 200
  - url: https://idp.tju.edu.cn/idp/profile/SAML2/Redirect/SSO
    status: 400
  - url: https://idp.tju.edu.cn/idp/status
    status: 403
  - url: https://technical.edugain.org/api.php?action=list_entities&format=json&fed_id=CARSI
    status: 200
  - url: https://technical.edugain.org/api.php?action=list_feds
    status: 200
  - url: https://www.carsi.edu.cn/
    status: 200
  - url: https://api.crossref.org/members/34483
    status: 200
  - url: https://api.crossref.org/members?query=Tianjin+University
    status: 200
  - url: https://api.ror.org/v2/organizations/012tb2g32
    status: 200
  - url: https://ror.org/012tb2g32
    status: 200
  - url: https://en.tju.edu.cn/
    status: 200
  - url: https://www.tju.edu.cn/
    status: 200
  - url: https://home.lib.tju.edu.cn/
    status: 200
  - url: https://find.lib.tju.edu.cn/
    status: 200
  - url: https://news.tju.edu.cn/
    status: 200
  - url: https://oaa.tju.edu.cn/
    status: 200
  - url: https://gs.tju.edu.cn/
    status: 200
  - url: https://cic.tju.edu.cn/
    status: 200
  - url: https://github.com/TJUBlockchainLab
    status: 200
  - url: https://cn.linkedin.com/school/tianjinuniversity/
    status: 999
  - url: https://api.datacite.org/providers?query=Tianjin
    status: 200
  - url: https://api.datacite.org/clients?query=Tianjin
    status: 200
  - url: https://opac.lib.tju.edu.cn/
    status: 200
  - url: https://ir.lib.tju.edu.cn/
    status: 200
  - url: https://portal.tju.edu.cn/
    status: 200
  - url: https://ir.lib.tju.edu.cn/oai?verb=Identify
    status: 200
  - url: https://home.lib.tju.edu.cn/oai?verb=Identify
    status: 404
  - url: https://www.tju.edu.cn/oai?verb=Identify
    status: 404
  - url: https://idp.tju.edu.cn/.well-known/openid-configuration
    status: 404
  - url: https://idp.tju.edu.cn/idp/profile/oidc/keyset
    status: 404
  - url: https://www.tju.edu.cn/.well-known/openid-configuration
    status: 404
  - url: https://www.tju.edu.cn/.well-known/security.txt
    status: 404
  - url: https://www.tju.edu.cn/llms.txt
    status: 404
  - url: https://www.tju.edu.cn/robots.txt
    status: 404
  - url: https://en.tju.edu.cn/sitemap.xml
    status: 404
  - url: https://gs.tju.edu.cn/info/1023/4816.htm
    status: 404
  - url: https://api.tju.edu.cn/
    status: 0
  - url: https://data.tju.edu.cn/
    status: 0
  - url: https://developer.tju.edu.cn/
    status: 0
  - url: https://open.tju.edu.cn/
    status: 0
  - url: https://hpc.tju.edu.cn/
    status: 0