atomno-mcp-fns-calc
Offline Russian tax calculator MCP server: VAT, simplified tax, sole proprietor contributions, income tax, patent and penalties with Tax Code references
- 1 ★ on the repository
- Last commit
- MIT
Extended access
Why this level
- Starts a tax calculator server via uvx that works offline
- With MCP_FNS_CALC_TOKEN it sends INNs to the author's external service for status checks
Install
- Works in
- Services
In your terminal, with SkillFoxx CLI
npx skillfoxx add mcp/atomno-mcp-fns-calcDetects the agents on your machine, shows the access level and pins the version.
Other ways to install
Access and checks
How we reviewExtended accessThe tool runs code or makes network calls and only reads external data.
- Starts a tax calculator server via uvx that works offline
- With MCP_FNS_CALC_TOKEN it sends INNs to the author's external service for status checks
This is third-party code. Review the repository files before installing.
What it does
Six calculators run locally with no internet or key. The server adds or extracts VAT, computes the simplified tax on income or income minus expenses with the minimum tax and contribution deduction, and fixed sole proprietor contributions with the percentage above the threshold and partial years. It also covers progressive personal income tax with a per-bracket breakdown, patent cost and penalties at the central bank key rate. Each answer includes the formula, a Tax Code article reference and a disclaimer. Five INN status checks, such as self-employment or account blocks, work only through the author's paid hosted API.
Who it is for. Accountants, sole proprietors and small business owners who need quick tax calculations while working with an agent.
Good fit when
- You need to extract or add VAT for a contract amount
- You need to compare 6 and 15 percent simplified tax for projected income and expenses
- You need to calculate a late payment penalty
Not a fit when
- You need tax advice or a filed return
- You need free INN status checks: they are paid-tier only
Example request
Calculate sole proprietor contributions for 2025 at 2.4 million rubles income and compare simplified tax on income versus income minus expenses with 1.5 million expensesMCP
- Transport
- stdio
- Authentication
- not required
Environment variables
MCP_FNS_CALC_TOKENsecret- Paid plan key for status checks and fresh rates
MCP_FNS_CALC_TIMEOUT- HTTP timeout in seconds
Limitations
Built-in rates and limits are a snapshot at package release and should be checked against the Tax Code. Fresh rates and status checks need the MCP_FNS_CALC_TOKEN key on a paid plan. Not affiliated with the tax service and no substitute for an accountant.
How to disable. Remove the fns-calc block from your MCP client config and uninstall with pipx uninstall atomno-mcp-fns-calc.
FAQ
Is internet access required?
Not for the six calculators and the rate snapshot. Network and a key are only needed for status checks and fresh rates.
Can I trust a result without checking?
No, the author states it is not advice. Check rates against the Tax Code; every answer cites the article.
Discussion
No questions or reviews yet.
An MCP server that checks Russian counterparties by INN or OGRN: company registry, bankruptcy, tax debt, bailiffs and arbitration
htmlweb.ru MCP: lookups, checks and payments
htmlweb.ru MCP Server
A remote MCP server for htmlweb.ru with dozens of methods: INN checks, geodata, calendar, validators, plus card binding and charges
NewDB MCP server for KYC and company checks
NewDB MCP Server
The official MCP server for the paid NewDB API: passports, bailiff debts, company registry, tax account holds and bankruptcy checks across Russia and the CIS
Russian public procurement MCP server: tender search on zakupki.gov.ru under 44-FZ and 223-FZ, tender cards and OKPD2 code lookup
EGRUL and EGRIP MCP server: company and sole proprietor details, director and founders from Federal Tax Service open data, self-hosted
Unofficial Checko.ru MCP server for counterparty checks: EGRUL, EGRIP, financials, court cases, state contracts and bankruptcies
README in short
The short Russian README lists offline calculators and paid INN status checks. It gives uvx and pipx launch commands and a Cursor and Claude Desktop config with an optional key. A tool table shows which run offline and which need the hosted API. It ends with a disclaimer that this is not tax advice. MIT license.