# CLIO Library Catalog Open Data

**Canonical:** https://apis.io/apis/columbia/clio-opendata/  
**Provider:** Columbia University — https://apis.io/providers/columbia/  
**Base URL:** https://lito.cul.columbia.edu/extracts/ColumbiaLibraryCatalog/full/  
**Documentation:** https://library.columbia.edu/bts/clio-data.html

CLIO Library Catalog Open Data is one of 10 APIs that [Columbia University](https://apis.io/providers/columbia/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Library, Catalog, MARCXML, Open Data, and Bulk Download. The published artifact set on APIs.io includes API documentation and a GitHub repository.

Columbia University Libraries publishes its full catalogue — bibliographic and holdings records from the integrated library system behind CLIO — as gzipped MARCXML bulk extracts under a CC0 1.0 Public Domain Dedication, refreshed monthly, alongside a deletes file. 108 files were present in the extract directory at probe time, served from an open Apache directory index with no credential and no rate limit. Covers books, serials, music, video and manuscripts; excludes Law Library and ReCAP partner records. There is no manifest, no checksum, no change feed and no harvesting protocol — a consumer diffs the directory listing.

## Machine-readable artifacts (3)

- **Documentation** — https://library.columbia.edu/bts/clio-data.html
- **GitHubRepository** — https://github.com/cul/clio-spectrum
- **Lifecycle** — https://raw.githubusercontent.com/api-evangelist/columbia/refs/heads/main/lifecycle/columbia-lifecycle.yml

## Other Columbia University APIs (9)

- [Columbia University Libraries Hours API](https://apis.io/apis/columbia/library-hours/)
- [Columbia Identity — Shibboleth IdP and CAS](https://apis.io/apis/columbia/identity/)
- [Columbia Open Data Service](https://apis.io/apis/columbia/opendata/)
- [CU Directory of Classes](https://apis.io/apis/columbia/directory-of-classes/)
- [Columbia Academic Commons](https://apis.io/apis/columbia/academic-commons/)
- [Digital Library Collections and the 10.7916 DOI namespace](https://apis.io/apis/columbia/dlc/)
- [IRI/LDEO Climate Data Library](https://apis.io/apis/columbia/iri-data-library/)
- [CourseWorks (Instructure Canvas)](https://apis.io/apis/columbia/courseworks/)
- [Columbia University Data Platform (Redivis)](https://apis.io/apis/columbia/redivis/)

## Tags

Library, Catalog, MARCXML, Open Data, Bulk Download, CC0

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