Nummeropslag runs on your own machine — the client starts it, so there is no endpoint to ping. 113 installs a week from pypi. Last commit 2 Nov 2026.
Privacy-first Danish caller ID, CVR company lookup, operator data, and community spam signals.
We read the source, 5 d ago · rules 995398eba69f
Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.
<script src="https://cdn.redoc.ly/redoc/latest/bundles/redoc.standalone.js"></script>
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Today is the operative word: we check Nummeropslag 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 nummeropslag -e 'NUMMEROPSLAG_API_KEY=<NUMMEROPSLAG_API_KEY>' -- uvx nummeropslag-mcp
{
"mcpServers": {
"nummeropslag": {
"command": "uvx",
"args": [
"nummeropslag-mcp"
],
"env": {
"NUMMEROPSLAG_API_KEY": "<NUMMEROPSLAG_API_KEY>"
}
}
}
}
[mcp_servers.nummeropslag]
command = "uvx"
args = ["nummeropslag-mcp"]
env = { NUMMEROPSLAG_API_KEY = "<NUMMEROPSLAG_API_KEY>" }
{
"mcpServers": {
"nummeropslag": {
"command": "uvx",
"args": [
"nummeropslag-mcp"
],
"env": {
"NUMMEROPSLAG_API_KEY": "<NUMMEROPSLAG_API_KEY>"
}
}
}
}
{
"servers": {
"nummeropslag": {
"type": "stdio",
"command": "uvx",
"args": [
"nummeropslag-mcp"
],
"env": {
"NUMMEROPSLAG_API_KEY": "<NUMMEROPSLAG_API_KEY>"
}
}
}
}
Put your own value in place of
<NUMMEROPSLAG_API_KEY> (Partner API key from https://nummeropslag.dk/api-noegle).
The author’s registry entry marks it as required.
Who-called phone lookups: community verdict, spam rating, operator and reviews (ktozvonil.net).
Private company data & real-time news signals for AI agents.
Danish company data (CVR) and annual-report financials for B2B lead research. Read-only.
Spanish company data: CIF lookup, BORME, directors, KYB, sanctions and open public tenders.
Romanian company data (ONRC/ANAF): CUI lookup, KYB risk, financials. Pay per call via x402 USDC.
Swedish company data: segment companies by industry, place and size, and look up any company.
Private company data, entity-resolved news, targeted lists, and alternative signals for AI agents.
Danish address & property lookup: BBR, Matriklen, DAR, CVR. A DAWA/Datafordeler-compatible source.
Answers built from our own checks of this server.