Penn Courses API (Penn Course Alert / Plan / Review / Degree Plan)
One API, four student-facing products: Penn Course Alert (PCA), Penn Course Plan (PCP), Penn Course Review (PCR) and Penn Degree Plan (PDP), plus a shared Accounts resource. The live OpenAPI 3.0.2 document at penncourseplan.com/api/openapi/ declares 45 paths across 29 tags and returned HTTP 200 (415 KB) on 2026-08-19; public course search reads anonymously while review and user-scoped resources return 403. Operated by PENN LABS, a non-profit student-run software organization at Penn, on domains registered to Penn Labs — not by the university. The 29 OpenAPI documents held here are the per-tag split of that single contract; they are one surface, not twenty-nine. The previous profile listed them as twenty-nine separate University of Pennsylvania APIs.