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Data source: CVR via cvrapi.dk (free public API, Det Centrale Virksomhedsregister)

MCP MCP Protocol

Endpoint https://context.gnist.ai/mcp/cvr/

nobloat — strip report_feedback tool URL-based auth (for clients without header support)

claude_desktop_config.json

{
  "mcpServers": {
    "gnist-cvr": {
      "url": "https://context.gnist.ai/mcp/cvr/",
      "headers": {
        "Gnist-API-Key": "YOUR_API_KEY"
      }
    }
  }
}

Shell

curl -X POST "https://context.gnist.ai/mcp/cvr/" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Gnist-API-Key: YOUR_API_KEY" \
  -d '{"jsonrpc": "2.0", "method": "tools/call", "id": 1, "params": {"name": "lookup_cvr_company", "arguments": {"cvr_number": 1}}}'

API REST API

API Root https://context.gnist.ai/rest/cvr/

4 endpoints available:

GET /rest/cvr/lookup_cvr_company
GET /rest/cvr/search_cvr_company
GET /rest/cvr/lookup_cvr_production_unit
GET /rest/cvr/report_feedback

Shell

curl "https://context.gnist.ai/rest/cvr/lookup_cvr_company?cvr_number=1" \
  -H "Gnist-API-Key: YOUR_API_KEY"

Python

import httpx

resp = httpx.get(
    "https://context.gnist.ai/rest/cvr/lookup_cvr_company",
    headers={"Gnist-API-Key": "YOUR_API_KEY"},
    params={
        "cvr_number": 1
},
)
print(resp.json())

OpenAPI Spec · Full API Docs