Grundfast MCP
MCP server exposing 12 tools for Danish public registers including BBR, Matriklen, DAR addresses, CVR, and elevation data.
About
Grundfast provides a hosted Model Context Protocol (MCP) server that connects AI agents directly to cleaned Danish public registry data. Over a single Streamable HTTP JSON-RPC endpoint (https://api.grundfast.dk/mcp), agents get 12 structured tools covering BBR property rollups and bitemporal history, Matriklen cadastral parcels, DAR address autocomplete and geocoding, CVR company lookups, DHM terrain elevation, and GeoDanmark building polygons.
Actionable Use Cases
- 01Look up BBR building and unit data for Danish properties via BFE number
- 02Search and validate Danish addresses with DAR autocomplete and data wash
- 03Retrieve CVR company registration records and company metadata
- 04Query bitemporal registration history for BBR buildings and addresses
- 05Fetch terrain and surface elevation (DHM) and GeoDanmark building polygons for coordinates
Technical Details & Limits
Requires a Grundfast API key (gf_live_... or free sandbox gf_test_...) passed in the Authorization header. Operates over Streamable HTTP (JSON-RPC 2.0). Billed and metered identically to REST API calls. Independent compatibility mirror — not run by SDFI or Erhvervsstyrelsen.
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