Step 1 of 4 · Projectsv0.1 · 28 Sep 2026

Open tax projects for companies and tax authorities. One list.

158 projects11 of 11 categories covered34 jurisdictions + global

Pick a category, narrow by jurisdiction or tax area, or just search. Open any entry for the details. Empty categories are marked, so you can see where the gaps are.

158 projects

Tax engines

39 projects

Rules-as-code that compute liabilities, returns and reforms.

Agent skills

3 projects

Packaged tax expertise an AI agent can follow, step by cited step.

MCP

13 projects

Open connectors and protocols between agents and legislation, case law and ledgers.

Plugins

1 project

Bundles of skills, tools and agents, installable in one go.

APIs

54 projects

Validation, rates, filings and registries you can call directly.

Tax calendars

1 project

Filing and payment deadlines as open, machine-readable feeds.

Automations

21 projects

Reusable workflows for provisions, reconciliations and compliance runs.

Tax datasets

15 projects

Rates, treaties and statistics, open and versioned.

Legal datasets

5 projects

Statute, case law and guidance your agents can cite.

Benchmarks

3 projects

Evals that show whether a model reasons about tax, or guesses.

Models

3 projects

Open AI models trained or tuned for tax text.

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Next · Step 2 of 4The mapSee where the projects fit in a tax department and a tax authority, and where the gaps are.