# Penn Libraries Franklin Catalog — JSON API

**Canonical:** https://apis.io/apis/university-of-pennsylvania/franklin-catalog/  
**Provider:** University of Pennsylvania — https://apis.io/providers/university-of-pennsylvania/  
**Base URL:** https://find.library.upenn.edu  
**Documentation:** https://find.library.upenn.edu/

Penn Libraries Franklin Catalog — JSON API is one of 10 APIs that [University of Pennsylvania](https://apis.io/providers/university-of-pennsylvania/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Library, Library Catalog, Bibliographic Data, Open Data, and Discovery. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

JSON:API surface of Franklin, the Penn Libraries discovery catalog, operated by Penn Libraries on find.library.upenn.edu. /catalog.json returned HTTP 200 with links, meta.pages and data[] over 388,604 records; /catalog/{id}.json returned 200 for a record id taken from that result set; an unmatched query correctly returned 200 with an empty data[] rather than a 404. Penn Libraries publishes an open-metadata policy explicitly permitting reuse of this data. Contract derived from live probes.

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/university-of-pennsylvania/refs/heads/main/openapi/university-of-pennsylvania-franklin-catalog-openapi.yml
- **Documentation** — https://find.library.upenn.edu/
- **TermsOfService** — https://www.library.upenn.edu/about/policies/open-metadata
- **x-errors** — https://raw.githubusercontent.com/api-evangelist/university-of-pennsylvania/refs/heads/main/errors/university-of-pennsylvania-errors.yml
- **x-lifecycle** — https://raw.githubusercontent.com/api-evangelist/university-of-pennsylvania/refs/heads/main/lifecycle/university-of-pennsylvania-lifecycle.yml

## Other University of Pennsylvania APIs (9)

- [Penn Courses API (Penn Course Alert / Plan / Review / Degree Plan)](https://apis.io/apis/university-of-pennsylvania/penn-courses/)
- [Penn Clubs API](https://apis.io/apis/university-of-pennsylvania/penn-clubs/)
- [Penn SDK (Python)](https://apis.io/apis/university-of-pennsylvania/penn-sdk-python/)
- [Penn SDK (JavaScript / Node)](https://apis.io/apis/university-of-pennsylvania/penn-sdk-js/)
- [PennKey Identity Provider — SAML 2.0 / Shibboleth Metadata](https://apis.io/apis/university-of-pennsylvania/pennkey-identity-provider/)
- [ScholarlyCommons at Penn — OAI-PMH](https://apis.io/apis/university-of-pennsylvania/scholarlycommons-oai-pmh/)
- [ScholarlyCommons at Penn — DSpace REST API](https://apis.io/apis/university-of-pennsylvania/scholarlycommons-rest/)
- [Colenda Digital Repository — Search JSON](https://apis.io/apis/university-of-pennsylvania/colenda/)
- [OPenn — Open Manuscript Data](https://apis.io/apis/university-of-pennsylvania/openn/)

## Tags

Library, Library Catalog, Bibliographic Data, Open Data, Discovery

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/university-of-pennsylvania/franklin-catalog/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/university-of-pennsylvania/.