Columbia University

CU Directory of Classes

The public web directory of Columbia University class offerings, browsable by subject, department, semester, instruction method, weekday and start time. Live and fully readable, and HTML only — there is no documented API, no JSON feed and no machine-readable expression of Columbia's course vocabulary published by the university anywhere. The registrar's own Vergil course search sits behind the Cloudflare challenge. Recorded because course catalog is one of the surface classes a university genuinely operates, and Columbia operates this one without a contract. Third-party projects crawl this directory and republish it as JSON; those are not Columbia's and are deliberately not linked here as Columbia's.

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Documentation

📖
Documentation
https://doc.sis.columbia.edu/

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API entry from apis.yml

apis.yml Raw ↑ 
aid: columbia:directory-of-classes
name: CU Directory of Classes
description: The public web directory of Columbia University class offerings, browsable by subject, department,
  semester, instruction method, weekday and start time. Live and fully readable, and HTML only — there
  is no documented API, no JSON feed and no machine-readable expression of Columbia's course vocabulary
  published by the university anywhere. The registrar's own Vergil course search sits behind the Cloudflare
  challenge. Recorded because course catalog is one of the surface classes a university genuinely operates,
  and Columbia operates this one without a contract. Third-party projects crawl this directory and republish
  it as JSON; those are not Columbia's and are deliberately not linked here as Columbia's.
humanURL: https://doc.sis.columbia.edu/
tags:
- Courses
- Course Catalog
- Directory
- Registrar
- HTML Only
- No API
properties:
- type: Documentation
  url: https://doc.sis.columbia.edu/
x-operator: institution
x-operator-evidence: doc.sis.columbia.edu resolves to miscredirect-prod.cc.columbia.edu / 128.59.44.55,
  in Columbia University address space.
x-access: public
x-status: 200 text/html, no machine-readable representation, probed 2026-08-19