Columbia University Libraries Hours API
The only institution-operated, publicly consumable, unauthenticated API found anywhere in Columbia University's estate. Two read operations: which library locations are open right now, and the posted hours for one location over a date or a date range. Returns JSON with Access-Control-Allow-Origin set to *, so it is directly callable from a browser or an agent with no key, no registration and no click-through. Columbia publishes no OpenAPI, no reference documentation and no changelog for it; the contract in this repository was reverse-engineered from live probes and from Columbia's own openly published application source. Small, undocumented, and genuinely theirs.
Columbia University Libraries Hours API is one of 10 APIs that Columbia University publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 1 JSON Schema definition.
Tagged areas include Campus Life, Library, Hours, Locations, and Open Data. The published artifact set on APIs.io includes an OpenAPI specification, authentication docs, a GitHub repository, and 1 JSON Schema.
This API exposes 2 operations across 2 paths, and defines 5 schemas. It is described by OpenAPI 3.1.0, at version 1.0.0.
Requests are made against a single base URL, https://hours.library.columbia.edu/api/v1.
Metadata
The identity and technical contract details declared by the specification.
Paths & Operations 2
Across 2 paths, the API surfaces 2 operations — 2 GET. Each is listed below with its method, path, parameters, and response codes.
Library locations and their posted opening hours.
Schemas 5
The contract defines 5 schemas that model the data the API accepts and returns. The most detailed are DayHours (9 properties), OpenWindow (3 properties), ErrorResponse (2 properties), LocationHoursResponse (1 property). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from Columbia University 9
Other APIs Columbia University publishes across the network.
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