# Campus-Network-Gated Systems (repository, OPAC, portal)

**Canonical:** https://apis.io/apis/tianjin/campus-gated-systems/  
**Provider:** Tianjin University — https://apis.io/providers/tianjin/  
**Documentation:** https://home.lib.tju.edu.cn/

Campus-Network-Gated Systems (repository, OPAC, portal) is one of 6 APIs that [Tianjin University](https://apis.io/providers/tianjin/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Research Repository, Institutional Repository, Library, Restricted, and Education. The published artifact set on APIs.io includes authentication docs.

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.

## Machine-readable artifacts (2)

- **Website** — https://home.lib.tju.edu.cn/
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/tianjin/refs/heads/main/authentication/tianjin-authentication.yml

## Other Tianjin University APIs (5)

- [Tianjin University Shibboleth Identity Provider (SAML 2.0 metadata)](https://apis.io/apis/tianjin/shibboleth-idp/)
- [CARSI / eduGAIN Federation Registration (entity 671640)](https://apis.io/apis/tianjin/carsi-edugain/)
- [Crossref Membership (member 34483, prefix 10.55582)](https://apis.io/apis/tianjin/crossref/)
- [ROR Registration (https://ror.org/012tb2g32)](https://apis.io/apis/tianjin/ror/)
- [TJU Library Unified Discovery (统一检索)](https://apis.io/apis/tianjin/library-discovery/)

## Tags

Research Repository, Institutional Repository, Library, Restricted, Education

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/tianjin/campus-gated-systems/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/tianjin/.