ARES (Czech business registry) runs on your own machine — the client starts it, so there is no endpoint to ping. 55 installs a week from npm. Last commit 26 Jun 2026.
MCP for ARES, the Czech business registry: lookup, due diligence, insolvency, signed provenance
Today is the operative word: we check ARES (Czech business registry) every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add ares-mcp -- npx -y @milos106/ares-mcp
{
"mcpServers": {
"ares-mcp": {
"command": "npx",
"args": [
"-y",
"@milos106/ares-mcp"
]
}
}
}
[mcp_servers.ares-mcp]
command = "npx"
args = ["-y", "@milos106/ares-mcp"]
{
"mcpServers": {
"ares-mcp": {
"command": "npx",
"args": [
"-y",
"@milos106/ares-mcp"
]
}
}
}
{
"servers": {
"ares-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@milos106/ares-mcp"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
ARES_PROVENANCE_PRIVATE_KEY (Optional Ed25519 private key (base64 PKCS#8 DER) to enable signed provenance envelopes. Omit to run unsigned), ARES_PROVENANCE_KEY_ID (Optional key id advertised in signed envelopes and the JWKS. Defaults to a thumbprint of the public key), ARES_BASE_URL (Optional override of the ARES REST base URL (defaults to the public ares.gov.cz endpoint)).
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Answers built from our own checks of this server.