Federal policy structured data options

What are options for APIs, XML downloads, and structured permalinks for US federal policy documents, available from official government websites?

See also: https://usgpo.github.io/innovation/resources/

Citation tools

Put in a citation, get a set of links: https://www.law.cornell.edu/rio/

Put in a citation, get a set of links: https://github.com/unitedstates/uslaw.link - https://uslaw.link/

Citation extractor: https://github.com/unitedstates/citation

Bills

• API for bills, summaries of bills, etc - Congress.gov
• Bulk data sets for bill text, status, summaries - https://www.govinfo.gov/developers
• GovInfo Link Service for bills - https://www.govinfo.gov/link-docs

Statute

Documentation:

• Document Type Definition files - House of Representatives

Individual statute

• StatViewer, unique links to public law pages (PDFs embedded in page) - example: https://uscode.house.gov/statviewer.htm?volume=95&page=788 - House of Representatives - not sure if documented
• GovInfo Statute Compilations API - also in GovInfo Link Service
• GovInfo Public and Private Laws API - also in GovInfo Link Service
• GovInfo Statutes at Large API - also in GovInfo Link Service

Codified (US Code)

• Bulk XML downloads of public law - House of Representatives
• Pages at uscode.house.gov have permalinks to individual paragraphs - example: https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title42-section1320b-7&num=0&edition=prelim#substructure-location_d - documented on FAQ page
• US Code titles and sections - GovInfo API & GovInfo Link Service

Regulations

Codified (CFR)

• JSON & XML API - Current and past text - individual changes back to ~2017 - eCFR.gov
• GovInfo API and Link Service - https://www.govinfo.gov/link-docs/ - Annual editions back to 1996

Rules

Individual Federal Register documents

• JSON API - Documents, metadata, search - back to ~1994 - FederalRegister.gov
• Unique links (not sure if documented) - https://www.federalregister.gov/citation/##-FR-##### - FederalRegister.gov - partial info for documents, some back before 1994

Federal Register issues

• Library of Congress collection of scans from 1936 to 1993 is probably available via LoC APIs.
• GovInfo Link Service - https://www.govinfo.gov/link-docs/

Histories of Federal Register document "families"

• RIN data in XML - RegInfo.gov - not sure if documented - example: https://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201210&RIN=0938-AR18&operation=OPERATION_EXPORT_XML (page where that's linked). Resources: XML reports for rules under review + Unified Agendas.

Comments on documents

• Individual document API - Regulations.gov
• Bulk data download - Regulations.gov

Subregulatory guidance

I don't know of any APIs for this other than ours.