Is Ato safe and trustworthy?

tashan scores Ato on public evidence — tashan score 53.0/100, it is currently active, note: a single primary maintainer (bus-factor risk), no known advisories against the current release. Audit scope: OSV advisories, install-time scripts, build provenance and declared permission surface. We do not review source code or execute the capability.

How do I install Ato?

In Claude Code: run `claude mcp add ato -- npx -y ato-mcp`. In Cursor / Claude Desktop, add it to mcp.json / claude_desktop_config.json.

source: william-laverty/ato-mcp.

‹ The Index

Ato

npm

Your AI agent, fluent in Australian tax. MCP server with cited answers from 34,500+ ATO documents, the income tax and GST Acts and 4,900+ rulings, plus deduction, depreciation, BAS and audit-risk tools that know your tax profile.

Works with: Claude Code, Cursor, Claude Desktop, Codex CLI, Gemini CLI, Cline, Windsurf, VS Code (installable)
installable: each client documents how to load an MCP server of this type — that is the client's promise, not a claim verified against this capability

Category: Finance & Crypto — see all ranked ›

Work: Bookkeeping · Regulatory compliance

Who it is for: Finance / accounting · Legal / compliance · Security engineer

Install (Claude Code):

claude mcp add ato -- npx -y ato-mcp

deep

“4 tools documented (deduction_discovery, depreciation_helper, bas_prep_checklist…); 5 worked examples; setup and auth covered; states a limit — “Disclaimer — This service is provided as information…””

This grade is wrong ›

tashan score: 53.0
Instruction depth: 84.0 (deep — documents every tool, with worked examples, setup and a stated limitation)
Adoption: 389/wk
Upkeep: 62.0
Freshness: 79.0
Evidence coverage: 100% of the inputs this score can use
Health: active
License: AGPL-3.0-only

Security audit

Every finding is shown in full — which advisory, the version that fixes it, and the exact command run at install time. Nothing in this audit is behind a licence.

No known advisoriesclearchecked against OSV for 2.1.4 — this package, not its dependency tree

1 vulnerable dependencyinstalls[email protected] — GHSA-4mjr-xmp4-gh2g, GHSA-x5fp-wj9c-mxmx · found by resolving all 81 packages this installs and querying OSV at the version each resolves to, not by name

No access inferred from declared dependenciesnothing it depends on reaches files, shell or network. This reads declarations only — built-in APIs are invisible to it, so absence of a declaration is not absence of access

Signed build provenancepublished from public CI with an attestation

What changed recently

2026-09-13 the tashan score for ato-mcp fell to 53.0, from 73.0 Upkeep, freshness or adoption moved enough to change how this measures.

You are reading this because you came looking. tashan Pro gives tashan doctor the history behind it, so a run over your own config says which of YOURS moved.

You searched for one. Check the rest of your stack:

npx tashan-cli doctor

Reads the config already on your machine and names what is dead, deprecated or running code at install time. No account, nothing uploaded.

tashan Pro$6/mo

We recorded 1 change to Ato in the last 45 days. Pro tells you on the day — for the servers in your own config, not the ones you thought to look up.

The whole series behind any row, back to the first day we measured it
The replacement, named — not just the news that something died
tashan doctor over your own config, on your own machine

Start a 7-day trial › Everything measured on this page stays free.

Show your score

Measured this well? Put the live badge in your README — it updates as the score does.

[![tashan](https://tashan.sh/badge/pkg-ato-mcp.svg)](https://tashan.sh/capability/pkg-ato-mcp.html)

npm ↗ · source ↗ · pkg:ato-mcp

Already running this? Check your whole config — free, in your browser, nothing installed. Or npx tashan-cli doctor locally, which sends nothing at all.

Measured 2026-09-13 · scorer s5 · how · something wrong here?