ENS-PSL Library Catalogue (Koha REST + OAI-PMH)
The catalogue of the ten ENS-PSL libraries, hosted at catalogue.bib.ens.psl.eu under the institution's own domain and integrated by BibLibre. Two machine-readable interfaces answer publicly. The Koha REST API v1 serves unauthenticated /api/v1/public/* routes — verified against /api/v1/public/libraries, which returns the real ENS branch records with @ens.psl.eu contact addresses — and browses through a Swagger UI at /api/v1/.html; patron and staff routes require a library credential and no registration path is published. An OAI-PMH 2.0 provider at /cgi-bin/koha/oai.pl identifies as "bibliothèques de l'ENS-PSL" and exposes one set, CATALOGUE. Note the OAI provider advertises a baseURL of /opac/oai.pl which returns 404 from outside; the working base is the cgi-bin path recorded here. The interface contract is Koha's own — an open-source ILS every Koha library ships — so no OpenAPI is stored under this institution; the deployment, the domain and the records are ENS's.