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ARES (Czech business registry)

io.github.milos106/ares-mcp · v0.1.2

MCP for ARES, the Czech business registry: lookup, due diligence, insolvency, signed provenance

Website Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add ares-mcp -e ARES_PROVENANCE_PRIVATE_KEY=<ARES_PROVENANCE_PRIVATE_KEY> -e ARES_PROVENANCE_KEY_ID=<ARES_PROVENANCE_KEY_ID> -e ARES_BASE_URL=<ARES_BASE_URL> -- npx -y @milos106/[email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "ares-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@milos106/[email protected]"
      ],
      "env": {
        "ARES_PROVENANCE_PRIVATE_KEY": "<ARES_PROVENANCE_PRIVATE_KEY>",
        "ARES_PROVENANCE_KEY_ID": "<ARES_PROVENANCE_KEY_ID>",
        "ARES_BASE_URL": "<ARES_BASE_URL>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "ares-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@milos106/[email protected]"
      ],
      "env": {
        "ARES_PROVENANCE_PRIVATE_KEY": "<ARES_PROVENANCE_PRIVATE_KEY>",
        "ARES_PROVENANCE_KEY_ID": "<ARES_PROVENANCE_KEY_ID>",
        "ARES_BASE_URL": "<ARES_BASE_URL>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "ares-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@milos106/[email protected]"
      ],
      "env": {
        "ARES_PROVENANCE_PRIVATE_KEY": "<ARES_PROVENANCE_PRIVATE_KEY>",
        "ARES_PROVENANCE_KEY_ID": "<ARES_PROVENANCE_KEY_ID>",
        "ARES_BASE_URL": "<ARES_BASE_URL>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
ARES_PROVENANCE_PRIVATE_KEY
Optional, secret		Optional Ed25519 private key (base64 PKCS#8 DER) to enable signed provenance envelopes. Omit to run unsigned.
ARES_PROVENANCE_KEY_ID
Optional		Optional key id advertised in signed envelopes and the JWKS. Defaults to a thumbprint of the public key.
ARES_BASE_URL
Optional		Optional override of the ARES REST base URL (defaults to the public ares.gov.cz endpoint).

Details

Package@milos106/[email protected] (NPM, stdio)
First published25 Jun 2026
Last updated25 Jun 2026
Registry nameio.github.milos106/ares-mcp

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