CourtListener

What it does

US court data archive run by the non-profit Free Law Project: opinions back to the 1650s, federal dockets and filings from PACER, judges, financial disclosures and oral arguments, with alerts, a REST API, bulk data and an MCP server. The API needs an account token and allows 5 requests a minute, 50 an hour and 125 a day by default; more needs membership or a commercial agreement.

Where it fits on the map

• Company tax department › Controversy & Tax Risk › Tax controversypartly covered

  Named as a project to start with: French guidance as a dataset to put behind an agent, and US case law with a public API; the document tools sit on the Audit activity.

• Tax authority › Disputes & Appeals › Objections, appeals & litigationpartly covered

  Named as a project to start with: Case law with APIs for the US and the EU; nothing yet manages an appeal.

Similar projects

Of the same kind, for a shared jurisdiction or tax area. Not a ranking.

• ATO Australian Tax Law DatasetAustralian Taxation Office rulings and guidance, structured for AI use.
• BOFiP datasetThe French tax authority's official guidance (BOFiP), as a dataset for language models.
• BR-TaxQA-RQuestion-answering dataset for retrieval over Brazilian federal tax guidance.
• EUR-LexEU legislation and case law, with machine-readable open data.
• US Tax Law QASynthetic dataset of 4,000 US federal tax law questions with IRAC reasoning and IRC citations.Demo

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