Research Results

The Caselaw Visualization Blog by João Marinotti (HLS, 2020) shares data visualizations about U.S. caselaw using CAP data.

Publication by Justin Simard, Stanford Law Review (January 2020).

Publication by Jonathan H. Choi, NYU Law Review (May 2020).

Article by D. Daniel Sokol, Sara Bensley, and Maia Crook (June 2020).


This was a course collaboration from Harvard SEAS and Harvard Law School Library using data from CAP as part of Advanced Topics in Data Science (CS109b).

Paul Gowder shares his work teaching data science to law students at the University of Iowa.

Fun Stuff

Generate rhymes using caselaw!

What's the color of caselaw?

See all instances of "!"


Applications using CAP data created by HLS staff, students, and affiliates.


H2O uses the CAP API to provide free caselaw textbooks for anyone.

Cite Grid uses our citation graph data to visualize how states and other jurisdictions tend to cite to each other.

See all instances of "witchcraft" charted out on the U.S. map.

Applications (Third Party)

Applications using CAP data created by third parties.

"This is a prototype interface designed for the Boston Desegregation Archive: Annotated Case Law and Digital Reference project, a collaboration between the Boston Research Center, University Libraries, and NuLawLab at Northeastern University."

"The Citing Slavery Project provides a database of slave cases and the modern cases that continue to cite them as precedent."

The Constitution Annotated by Library of Congress uses the CAP API by linking to cases in footnotes and annotations.


Learn how to write case data from the Caselaw Access Project API to CSV.

Learn how to get opinion authors from cases with the CAP API and CourtListener.

This tutorial shares how to create a data analysis workspace with Voyant and the CAP API.

See some ways of getting started with the data! Examples are written in Python.