# grundfast-dk

**Canonical:** https://apis.io/providers/grundfast-dk/  
**Website:** https://grundfast.dk/  
**APIs profiled:** 1

Grundfast provides a drop-in compatibility API that mirrors the legacy services.datafordeler.dk endpoints for Danish property and geodata (BBR, Matrikel, valuation, building lines, CVR, etc.) ensuring continuity after Datafordeler's shutdown on 15 January 2027. It offers a single API key, auto‑pagination, and a free tier, serving cached data when the upstream service is unavailable.

## Kin Score — 59.6 / 100 (strong)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 65.0 |
| Contract Quality | 38.7 |
| Contract Governance | 79.1 |
| Operational Transparency | 75.8 |
| Developer Ergonomics | 68.3 |
| Access Clarity | 38.9 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 32.4 (matched via fallback).

## Agent readiness — 30.1 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | unknown |
| Well Known Catalog | yes |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | na |

## APIs (1)

- **Grundfast API** — REST over Datafordeler — BBR ejendom (BFE-keyed), Matriklen, DAGI, DHM, Stednavne, DAR address resolution, and CVR company lookup; translated kodelister, WGS84 geometry, and a p...

## MCP servers (1)

- **grundfast-dk MCP Server** — Remote MCP server at grundfast.dk.

## Security (3)

- **Grundfast Dk Authentication** — 3 schemes
- **Grundfast Dk Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Grundfast Dk Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Grundfast Dk Plans Pricing**

## Tags

RealEstate, Geodata, API, Denmark, Compatibility

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/grundfast-dk/). Scores are computed from the provider's own public artifacts under a published rubric.