MCP Eureka

Name: MCP Eureka
Author: matematicsolutions

by matematicsolutionsversion 0.2.0i★ –iRuns on your computer

Registry nameio.github.matematicsolutions/mcp-eureka

Install

Overview

Description from the maker (original English)

MCP server for Polish tax interpretations (KIS/MF) via EUREKA with citations.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Accounting, finance & tax

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "eureka": {
      "command": "npx",
      "args": [
        "-y",
        "@matematicsolutions/mcp-eureka"
      ]
    }
  }
}

Run this in your terminal

claude mcp add eureka -- npx -y @matematicsolutions/mcp-eureka

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "eureka": {
      "command": "npx",
      "args": [
        "-y",
        "@matematicsolutions/mcp-eureka"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "eureka": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@matematicsolutions/mcp-eureka"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account matematicsolutions, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Accounting, finance & taxi

More stars than 0% of the other 1722 servers in this category
Published to the registry more recently than 28% of the other 1722 servers in this category
Basic checks equal to or better than 100% of the other 1722 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is MCP Eureka safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.0) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Finance Toolkit, SolidInvoice, Korea Tax Calculator

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Finance Toolkit

by JerBouma

500+ transparent financial methods calculated from raw statements, not third-party endpoints.

Computer or cloud★ 5,496MITUpdated yesterday

Install

SolidInvoice

by SolidInvoice

Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.

Runs in the cloud★ 981MITUpdated 7 days ago

Install

Korea Tax Calculator

by UpstageAI

Korean tax calculation and tax-audit judgment MCP: 96 tools with statutory citations.

Runs on your computer★ 97MITUpdated today

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

mcp-eureka

An MCP (Model Context Protocol) server for the EUREKA system of the Ministerstwo Finansow / MF (Ministry of Finance) (eureka.mf.gov.pl) - 550,000+ documents of Polish tax practice, including 517,000+ individual interpretacje podatkowe (tax interpretations) of the Krajowa Informacja Skarbowa / KIS (National Revenue Information), general interpretations, tax explanations, and binding rate (WIS) and excise (WIA) information.

The largest single corpus of tax practice in Poland, available to Claude / Cursor / VS Code MCP agents with verifiable citations (signature + URL + date).

Status: v0.1.0 | License: MIT | Maintainer: MateMatic

Tax interpretations are not a source of law - they are the practice of

authorities (art. 14a-14s of the Tax Ordinance). Legal protection applies to

the applicant of a given individual interpretation.

Data source

The public JSON API of the EUREKA portal (Angular SPA backend, no key required), verified live on 2026-07-08:

POST /api/public/v1/wyszukiwarka/informacje/?size=N&page=N&sort=DT_WYD,desc - search (filters: SYG, KATEGORIA_INFORMACJI as an array of ids, DT_WYD_start/DT_WYD_end; searchQuery in the body). The trailing slash before `?` is mandatory - without it the backend returns HTTP 500.
GET /api/public/v1/informacje/{id} - full document (metadata + HTML content).
GET /api/public/v1/pozycje-slownika/wyszukiwarka?kodSlownika=KATEGORIA_INFORMACJI - category dictionary (28 entries).

MCP tools

`search(query?, full_phrase?, signature?, category_ids?, date_from?, date_to?, page?, page_size?)` - search with filters; sorted by issue date descending.
`get_interpretation(id)` - full document by ID_INFORMACJI (thesis + first 3000 characters of content).
`search_by_signature(signature)` - shortcut: by signature, full (0112-KDIL3.4012.367.2026.2.AK) or prefix (0112-KDIL3).
`list_categories()` - category dictionary (id -> name) for category_ids.

Every response includes structuredContent.citations (title, url, signature, issue_date) - the contract consumed by Patron and any MCP agent.

Quickstart

npm install

npm run build npm start # stdio transport

npm run drift # consistency INSTRUCTIONS <-> TOOLS <-> ErrorCode npm run test:parse # offline - fixtures from real API responses npm run smoke # LIVE - eureka.mf.gov.pl (throttled 2 req/s)

MCP client configuration (mcp-servers.json):

"mcpServers": { "eureka": { "command": "node", "args": [" /mcp-eureka/dist/index.js"] } } }

MateMatic Polish-law connectors

mcp-saos (common courts/SN/TK/KIO) · mcp-nsa (NSA + 16 WSA) · mcp-eureka (this one) · mcp-isap (Dz.U. + M.P.) · mcp-krs (KRS) · kio-orzeczenia-mcp (KIO)

Fleet convention: one connector = one source (single-source). Every call returns a citable source, zero content modification, stateless.

Disclaimer

The data comes from the public EUREKA system of the Ministry of Finance. The connector does not modify content, throttles requests (max 2 req/s), and identifies itself with a User-Agent carrying the repo address. Interpreting the law in a specific case requires your own individual interpretation or the opinion of a tax advisor.

License

MIT - see LICENSE.

Citation: *MateMatic Solutions (2026), mcp-eureka - MCP server for Polish tax interpretations (EUREKA/KIS), https://github.com/matematicsolutions/mcp-eureka, MIT.*

MCP Eureka

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Accounting, finance & taxi

Common questions

Alternatives

Finance Toolkit

SolidInvoice

Korea Tax Calculator

README from the maker

mcp-eureka

Data source

MCP tools

Quickstart

MateMatic Polish-law connectors

Disclaimer

License