Vaquill AI

Vaquill AI is an API covering more than 5.4 million sections of US primary law across all 56 jurisdictions, from statutes and regulations to constitutions, court rules and executive orders. Every section comes with a citation and a link to its official source.

Data is available through REST, MCP or SQL, and Vaquill can be used inside Claude. It supports point-in-time queries and Bluebook citation resolution, and includes the US Code, CFR, Federal Register, state statutes, session laws and agency guidance from 53 sources such as the IRS, DOJ, FTC and OFAC.

Agency guidance is stored separately from binding law and can be filtered by source. The whole corpus can be downloaded free for non-commercial use under CC BY-NC 4.0, and free credits are offered for personal, student and academic projects.