# Opentax

> Verifiable US tax oracle for AI agents: cited, machine-checkable federal and state tax computation

## Facts
- Page: https://tashan.sh/capability/pkg-invaro-opentax
- tashan id: pkg:@invaro/opentax
- Source: https://github.com/Invaro/opentax-engine
- npm: https://www.npmjs.com/package/@invaro/opentax
- Type: npm
- Category: other
- tashan score: 49.0 / 100
- Adoption: 29.0
- Upkeep: 59.0
- Freshness: 83.0
- Evidence coverage: 100% of the inputs this score can use
- Health: active
- Instruction depth: deep
- npm downloads: 117/week
- License: AGPL-3.0-only
- Official: no

## Install

```sh
claude mcp add opentax -- npx -y @invaro/opentax
```

## Security audit
- Known advisories: 0
- Install-time script: none declared
- Build provenance: not attested

Permissions are read from DECLARED dependencies only. Nothing is executed, so an empty result means "nothing declared", never "nothing possible".

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Measured 2026-09-13 by tashan (https://tashan.sh) from public evidence. Scorer s5.