# Grundfast

> Grundfast is a Danish property- and geodata API: the rock-solid compatibility layer over the
> Datafordeler (Klimadatastyrelsen) registers. It re-exposes the convenient old `services.datafordeler.dk` shape
> — translated code lists (kodelister), re-joined names, current-only data, WGS84 geometry, and
> automatic pagination — on top of the new entity-based WFS + GraphQL backend that Klimadatastyrelsen is moving
> everyone onto — the old services close on 15 January 2027. One bearer token, a stable cached SLA-mirror over an upstream that runs at
> ~90% uptime, and a typed TypeScript SDK.

Fourteen registers are live today (all in production): BBR (buildings + units), Matriklen (cadastral
parcels + ejerlav), Ejendomsvurdering (Vurderingsstyrelsen's public assessment series per BFE), DAR
(addresses — by-UUID lookup + autocomplete), CVR (companies), DAGI (administrative geographies, and
the reverse lookup that returns every subdivision covering one point), DHM (terrain and surface
elevation, plus the measured height of each building on a property), Stednavne (place names),
Jordforurening (områdeklassificering, § 50 a), Naturbeskyttelse (skovbyggelinjer, § 17),
Byggelinjer (the other naturbeskyttelseslov lines plus § 3-protected nature on one coordinate),
Plandata (zone, lokalplaner, delområder and kommuneplanrammer under the Planning Act),
Støjkortlægning (Miljøstyrelsen's strategic noise mapping: road, rail, airport and industry bands) and
Oversvømmelse (storm-surge depth to 2120, cloudburst depressions and designated flood risk areas).
Two derived layers sit on top of them: GeoDanmark building footprints joined to BBR, and Klimadatastyrelsen
orthophoto tiles by vintage. On top of DAR sits a
DAWA-compatible drop-in layer — address autocomplete down to floor and door (etage/dør), filtered
address lists with cirkel/polygon spatial filters, srid 4326/25832 and GeoJSON output, datavask
(address washing), reverse geocoding, coordinate→BFE (jordstykker), postnumre, vejnavne, ejerlav,
navngivne veje with their neighbours, bebyggelser, supplerende bynavne, landsdele, afstemningsområder and the other
DAGI temaer, plus `include=bbr` for the buildings on each address — so integrations pointed at DAWA
(Danmarks Adressers Web API, which closed 1 October 2026 at 10:00 and now answers 410 Gone) can
repoint one base URL and work again. Sold self-serve (Free tier,
then Starter 99 / Pro 249 / Scale 599 DKK/mo) and as an annual Enterprise
contract. Data originates from Datafordeler / Klimadatastyrelsen and is CC BY 4.0; Grundfast credits
the source and sells the transformation, the stability, and the SLA on top of the open data.

## For agents

- [Full reference (llms-full.txt)](https://grundfast.dk/llms-full.txt): every register, every documented endpoint with its parameters and errors, the plans and limits, every MCP tool with its arguments, and the full text of every guide — in one file, generated from source.
- [MCP server card](https://grundfast.dk/.well-known/mcp/server-card.json): the MCP endpoint, transport, protocol version, bearer-key auth and tool list as JSON.
- [Agent Skills index](https://grundfast.dk/.well-known/agent-skills/index.json): a skill describing how an agent should use Grundfast over MCP or REST.
- [API catalog](https://grundfast.dk/.well-known/api-catalog): RFC 9727 linkset of the API descriptions and docs.
- Any page as Markdown: send `Accept: text/markdown`, or append `?format=md` (e.g. https://grundfast.dk/docs/api?format=md).

## Product

- [Grundfast homepage](https://grundfast.dk/): the whole property behind an address — every register behind one key, looked up on the same BFE number, with translated codes, WGS84 geometry and a live demo.
- [Datafordeler alternative](https://grundfast.dk/datafordeler-alternativ): a drop-in Datafordeler alternative — swap one base URL, keep your old integration shape.
- [services.datafordeler.dk replacement](https://grundfast.dk/services-datafordeler-dk-erstatning): the old services.datafordeler.dk REST calls (closing 15 January 2027) and the Grundfast endpoint for each.
- [Datafordeler REST closes 15 January 2027](https://grundfast.dk/datafordeler-rest-lukker): Klimadatastyrelsen closes the REST services, web-user/service-user (username/password) access, the consolidated WFS services, WMS/WMTS/WCS on non-modernized access, Hændelser and Filudtræk on 15 January 2027; afterwards only API key or OAuth, data via GraphQL and Fildownload. How to find your calls, three ways forward, what Grundfast covers per register, and the official source.
- [BBR REST on the same path](https://grundfast.dk/datafordeler-bbr-rest): the old BBRPublic REST paths (bygning, enhed, grund, tekniskanlaeg, ejendomsrelation, bbrsag) with the same parameters and JSON under `https://api.grundfast.dk/datafordeler/BBR/BBRPublic/1/rest/` — change only the host; the Grundfast key goes in `password=` (username ignored), `apiKey=`, `token=`, `Authorization: Bearer` or `X-API-Key`. Included on every plan, one call = one unit. Served live from Datafordeler's BBR GraphQL, with every known deviation listed.
- [Matriklen REST on the same path](https://grundfast.dk/datafordeler-matriklen-rest): the old Matriklen2 REST paths, versions 1.0.0 and 2.0.0 (SamletFastEjendom, BygningPaaFremmedGrund, Ejerlejlighed, BestemtFastEjendom, MatrikelKommune, MatrikulaerSag) with the same parameters and JSON or XML under `https://api.grundfast.dk/datafordeler/Matriklen2/Matrikel/2.0.0/rest/` — change only the host; same key forms as BBR. Included on every plan, one call = one unit. Served live from Datafordeler's MAT GraphQL, with every known deviation listed.
- [EBR REST on the same path](https://grundfast.dk/datafordeler-ebr-rest): the old Ejendomsbeliggenhed REST paths (BFEnrAdresse, Ejendomsbeliggenhed, EjendomsbeliggenhedSimpel) with the same parameters and JSON or XML under `https://api.grundfast.dk/datafordeler/EBR/Ejendomsbeliggenhed/1/rest/` — change only the host; same key forms as BBR. Included on every plan, one call = one unit. Served live from Datafordeler's EBR, MAT, DAR and DAGI GraphQL, with every known deviation listed.
- [Migration guide](https://grundfast.dk/migrering): the Datafordeler timeline up to the 15 January 2027 closure and how to repoint in an afternoon — keep translated codes, joins, WGS84, current-only.
- [Pricing](https://grundfast.dk/priser): Free / Starter / Pro / Scale tiers + the annual Enterprise contract.
- [Ejendomsprofil](https://grundfast.dk/docs/api/ejendom-profil): `GET /v1/ejendom/{id}` — the whole property on a BFE number or a DAR address id in one keyed call: Matriklen, BBR, building footprints with measured heights, every address, DAGI, the latest vurdering, Plandata with an indicative remaining floor area, noise, protection lines, soil, flooding and energimærke; a part that did not answer is null, never a "no". `POST /v1/ejendom:batch` for lists (Pro 10 / Scale 20 / Enterprise 30 ids per call).
- [BBR API](https://grundfast.dk/bbr-api): one call on a BFE number returns the whole property — buildings, units, translated kodelister, materials, heating.
- [Matrikel API](https://grundfast.dk/matrikel-api): cadastral parcels (jordstykker) + ejerlav names, joined and reprojected to WGS84.
- [Ejendomsvurdering API](https://grundfast.dk/ejendomsvurdering-api): Vurderingsstyrelsen's public property assessment per BFE — ejendomsværdi, grundværdi and the whole year series. One BFE can hold two vurderingsejendomme, and one year two assessments; both are in the answer rather than averaged away.
- [Address (DAR) API](https://grundfast.dk/adresse-api): Danish addresses from the DAR register by UUID, with a one-call bridge to the property (BFE).
- [CVR API](https://grundfast.dk/cvr-api): Danish companies by CVR number — name, status, form, industry and location with translated municipality/region names.
- [DAGI API](https://grundfast.dk/dagi-api): administrative geographies (municipalities, regions, postal districts) as clean GeoJSON.
- [DHM API](https://grundfast.dk/dhm-api): terrain and surface elevation (DTM/DSM) at a coordinate, WGS84 in, over Datafordeler/Dataforsyningen.
- [Bygningspolygoner API (GeoDanmark)](https://grundfast.dk/bygningspolygoner-api): the building footprint of every building on a property, joined to its BBR record — the outline the 2D plan and the 3D massing are drawn from.
- [Bygningssøgning](https://grundfast.dk/bygningssoegning): every standing building in a kommune or postnummer that matches BBR facts — use, construction year, heating, roof and wall material, registered asbestos, area and an oil tank in use — with the exact count, a map and the `GET /v1/bbr/bygninger/soeg` call that returns the list (address, BFE, codes translated).
- [Historik API](https://grundfast.dk/historik-api): bitemporal history — every register read as of a past date with `?asOf=`, plus the per-building registration timeline for BBR, DAR and Matriklen.
- [Ortofoto / Luftfoto API](https://grundfast.dk/luftfoto-api): Klimadatastyrelsen aerial imagery as standard web-mercator XYZ tiles (JPEG, EPSG:3857; 256×256, or 512×512 for the same ground with `?dpr=2`) — drop-in for Leaflet/MapLibre — in any published vintage, plus a built-in Kort/2D/3D situationsplan view on the property page. Orientation backdrop only, not målfast.
- [Stednavne API](https://grundfast.dk/stednavne-api): official Danish place names near a coordinate (reverse geocoding across seven categories, nearest first).
- [Områdeklassificering API (§ 50 a)](https://grundfast.dk/omraadeklassificering-api): is a coordinate inside the municipality's områdeklassificering under jordforureningslovens § 50 a — and is it in an analysis-free sub-area? A `false` is measured, never a fault in disguise.
- [Kortlagt jordforurening API (V1/V2)](https://grundfast.dk/docs/api/jord-kortlaegning): is a coordinate — or a whole parcel (ejerlavskode + matrikelnummer) — on land the regions have mapped as possibly (V1) or documented (V2) contaminated under jordforureningsloven? With the lokalitet, the region, the official jordforureningsattest per matrikel, and on a parcel the measured share each mapped area covers. A `false` is measured, never a fault in disguise.
- [Skovbyggelinje API (§ 17)](https://grundfast.dk/skovbyggelinje-api): is a coordinate inside a registered skovbyggelinje (the 300 m building line around forest) — or has the line been lifted there? The source layer holds both, in two columns that disagree.
- [Byggelinje API (§ 8, § 15–19 + § 3)](https://grundfast.dk/byggelinjer-api): ten Danish building- and protection lines on one coordinate in one call — strandbeskyttelse (naturbeskyttelsesloven § 15) and klitfredning (§ 8), sø and å (§ 16), skov (§ 17), fortidsminde (§ 18), kirke (§ 19), § 3-protected nature and watercourses, and protected stone/earth dikes (museumsloven § 29 a) — each with a signed distance to the nearest edge (negative inside, positive outside). Reports the line, never a verdict on a project.
- [Plandata API (planloven)](https://grundfast.dk/plandata-api): zone (byzone, sommerhusområde, or landzone — derived, since the zonekort only maps the first two), the lokalplaner, delområder and kommuneplanrammer covering a coordinate or a BFE, each with its register status (vedtaget, forslag, aflyst), plan PDF, bebyggelsesprocent, max storeys and height. The BFE variant adds an indicative restbyggeret computed from Matriklen + BBR, with every input echoed and refused where the plan's basis does not allow it. Source: Plandata.dk (Erhvervsstyrelsen). A fault is a 502, never "no plan".
- [Støj API (noise mapping)](https://grundfast.dk/stoej-api): road, rail, airport and industry noise at a coordinate from Miljøstyrelsen's strategic noise mapping (EU Environmental Noise Directive) — the highest Lden and Lnight band per source in EU 5 dB classes, every mapped layer the point falls in (1.5 m and 4 m), and the mapping year (2017, the round Miljøstyrelsen publishes as a queryable service). A null band means "not mapped at or above 55 dB Lden / 50 dB Lnight here", never "quiet"; a fault is a 502.
- [Oversvømmelse API (flooding)](https://grundfast.dk/oversvoemmelse-api): flood exposure at a coordinate, an address (adgangsadresse_id) or a property (BFE) from three open sources — Kystdirektoratet's storm-surge depth (m, 100 m grid) for the 50-, 100-, 1,000- and 10,000-year water levels in 2020, 2070 and 2120 (RCP8.5); Miljøstyrelsen's terrain depressions where rain collects (bluespots), at the point, within 50 m and on the parcel; and the designated flood risk areas under the EU Floods Directive. Each part carries its own status: "utilgaengelig" means the source could not be read and is never "not flooded"; a null depth means "not modelled as flooded from the sea", and outside a risk area means "not designated", not "no risk". Streams outside the risk areas, groundwater and sewers are not covered, and every answer says so.
- [DAWA alternative](https://grundfast.dk/dawa-alternativ): a DAWA-style address/geodata API on the new Datafordeler sources, live after DAWA's closure.
- [DAWA lukket — fix your integration](https://grundfast.dk/dawa-lukket): what a broken DAWA integration looks like after 1 October 2026, the base-URL swap, and an endpoint-by-endpoint map of what is compatible and what is not.
- [DAWA lukkede 2026](https://grundfast.dk/dawa-lukker-2026): DAWA closed on 1 October 2026 at 10:00 (after two postponements) and now answers HTTP 410 — what closed, and the live Grundfast endpoint for each surface.
- [Danmarks Adresseregister (DAR)](https://grundfast.dk/danmarks-adresseregister): explainer of the Danish address register — what it holds, one real address taken apart into its DAR objects, national counts, and the ways to access it after DAWA closed.
- [DAWA vs. Datafordeleren](https://grundfast.dk/dawa-vs-datafordeler): decision guide after the DAWA closure — Datafordeleren (the registers themselves), Klimadatastyrelsen's Adressevælger/Adressevask (address fields) and Grundfast compared on access, data shape, search, washing, reverse geocoding and operations, with sources.
- [Address validation API](https://grundfast.dk/adressevalidering-api): validating ONE Danish address at the point of entry — accept (A), ask "did you mean …?" (B/C) or reject (no match), plus an exact etage/dør check and re-validating a stored DAR id.
- [Datavask API](https://grundfast.dk/datavask-api): wash a dirty address string against DAR — ranked candidates with A/B/C confidence bands (DAWA datavask drop-in).
- [Address autocomplete API](https://grundfast.dk/adresse-autocomplete-api): fuzzy + prefix address search over the DAR index (DAWA autocomplete drop-in).
- [Geocoding API](https://grundfast.dk/geokodning-api): forward geocoding — Danish address text or address fields → WGS84 access point, DAR id and BFE number, with an A/B/C confidence band.
- [Replace dawa-autocomplete2](https://grundfast.dk/docs/dawa-autocomplete2): `@grundfast/dawa-autocomplete` on npm — the same `dawaAutocomplete(input, options)` address field, options, `select` payload and CSS classes as the closed DAWA widget, running on Grundfast's DAWA-compatible autocomplete with a public (origin-restricted) key.
- [Reverse geocoding & BFE API](https://grundfast.dk/reverse-geocoding-api): coordinate → nearest address, and coordinate → cadastral parcel with BFE number.
- [Postnummer API](https://grundfast.dk/postnummer-api): Danish postal codes — list, lookup and autocomplete (DAWA postnumre drop-in). The full list (postnr, bynavn) is a free, keyless download: https://grundfast.dk/postnumre.xlsx (Excel), .csv and .json.
- [Vejnavne API](https://grundfast.dk/vejnavne-api): Danish street names — list and autocomplete from the DAR corpus (DAWA vejnavne drop-in).
- [Ejerlav API](https://grundfast.dk/ejerlav-api): cadastral districts (ejerlav) — code lookup, list and autocomplete from Matriklen.
- [Databerigelse](https://grundfast.dk/databerigelse): enriching an existing address or property list against every register in one pass — what each register adds and what it costs.
- [Address field in checkout](https://grundfast.dk/adressefelt-i-checkout): how to put a validated Danish address field in a checkout, framework-agnostic.
- [WooCommerce address autocomplete](https://grundfast.dk/woocommerce-adresse-autocomplete): dropping DAR-backed address autocomplete into a WooCommerce checkout.
- [Shopify address autocomplete](https://grundfast.dk/shopify-adresse-autocomplete): dropping DAR-backed address autocomplete into a Shopify checkout.
- [Kommunekoder](https://grundfast.dk/kommunekoder): the full list of Danish municipality codes with kommune and region, plus a lookup of the code for an address. Free download: https://grundfast.dk/kommunekoder.xlsx (Excel), .csv and .json. Codes are four digits with a leading zero (0101 København); Danmarks Statistik writes the same codes without it (101).
- [Ejerlavskoder](https://grundfast.dk/ejerlavskoder): the full list of ejerlav (cadastral district) codes and names, plus an address lookup. Free download: https://grundfast.dk/ejerlavskoder.xlsx (Excel), .csv and .json.
- [BBR anvendelseskoder](https://grundfast.dk/bbr-anvendelseskoder): every BBR use code for buildings and units, with meaning — generated from the tables the API translates with. Siblings for roof material (https://grundfast.dk/bbr-tagdaekningskoder), wall material (https://grundfast.dk/bbr-ydervaegskoder) and heating (https://grundfast.dk/bbr-varmeinstallationskoder). Each list is a free download as .xlsx (Excel), .csv and .json under the same name (e.g. https://grundfast.dk/bbr-anvendelseskoder.xlsx).
- [MCP server](https://grundfast.dk/mcp-server): a Model Context Protocol endpoint (POST /mcp) so AI agents can query every register with a gf_ key — thirty-four typed tools, metered like REST. Published in the official MCP registry as `dk.grundfast/danish-address-property-data` (streamable-http, bearer auth).
- [Ejendomsdata per kommune](https://grundfast.dk/ejendomsdata): property- and geodata for all 98 Danish municipalities (plus Christiansø) via one API, one page per kommune.
- [Statistik](https://grundfast.dk/statistik): Denmark's building stock in figures — construction years, heating, roofs, energy labels, assessment medians over time, soil contamination, noise and listed buildings — counted from BBR and the registers joined onto it.
- [Status](https://grundfast.dk/status): live API health and the upstream SLA-mirror state.

## Solutions

- [Solutions overview](https://grundfast.dk/loesninger): property data organised by the job it is used for, each shown on a real property.
- [Environmental and geotechnical consulting](https://grundfast.dk/loesninger/miljoe-og-geoteknik): the desk study before an asbestos/PCB screening or soil investigation — construction and extension years against the risk periods, facade and roof materials, § 50 a soil classification, building lines, terrain and aerial photos.
- [Roof and solar API](https://grundfast.dk/docs/api/dhm-tag-sol): every roof face on a BFE measured in the national elevation model (true area from footprint and measured pitch, direction, eaves/ridge/rafter lengths), shade per month measured by ray-marching the 0.4 m surface model around each face, kWh per kWp from PVGIS (EU JRC) with that shade applied, a panel layout, and three system sizes with economics on Energinet day-ahead prices weighted by the address's own sunshine. Every assumption is in the response and the economic ones can be overridden. A roof the elevation model cannot name is reported as not computed with its reason, never guessed. Also as a PDF report.
- [Local plan quotes API](https://grundfast.dk/docs/api/plan-citater): the paragraphs of each lokalplan PDF covering a BFE that speak to solar panels, roof material, roof form, reflective surfaces, height, plot ratio or colours — verbatim, with the PDF page. A scanned plan is reported as having no text layer, never as silent.
- [Miljøscreening API](https://grundfast.dk/docs/api/miljoe-screening): a register-based environmental pre-screening of every building on a BFE before renovation or demolition — asbestos, PCB, lead, PAH/tar, chlorinated paraffins and heavy metals per building part (roof, facade, windows/joints, floors, interior walls, installations, wet rooms, foundation), derived from the Danish EPA's building atlas (Miljøprojekt nr. 2269) with the reasons and rule ids; plus the ground (V1/V2, områdeklassificering, oil tanks), demolition constraints and an indicative waste estimate against the 1-ton threshold. Also as a PDF report and a batch. Missing input is "ikke_vurderet", never "low". Not a statutory miljø- og ressourcekortlægning.
- [Due diligence and investment](https://grundfast.dk/loesninger/due-diligence): screening a property or a portfolio — BBR, cadastre, the full assessment series, CVR, point-in-time history and batch/export.
- [Property development and building rights](https://grundfast.dk/loesninger/projektudvikling): plot, footprints, measured building heights, terrain and all ten building lines with signed distances on one address.
- [Proptech and housing platforms](https://grundfast.dk/loesninger/proptech): capture the address right with autocomplete and address washing, then show the whole home in the product.
- [Insurance and risk](https://grundfast.dk/loesninger/forsikring): the building and the ground behind a policy — use, age, roof and wall material, heating, listing, terrain elevation and building lines — as inputs to the insurer's own model, plus stormflod, lavninger and designated flood risk areas (no claims or score data).

## Tools

Working tools on grundfast.dk for any Danish address, built on the same endpoints. Without an account a visitor gets 3 properties a day (the same property again is free, in any tool); signed in, lookups count as API calls on the account's plan.

- [Tools overview](https://grundfast.dk/vaerktoejer): the five tools, one per solution.
- [Desk study (skrivebordsundersøgelse)](https://grundfast.dk/vaerktoejer/skrivebordsundersoegelse): the miljøscreening per building and building part, ground, bindings and flood for an address — and the PDF report with a case number.
- [Site analysis (grundanalyse)](https://grundfast.dk/vaerktoejer/grundanalyse): plot, existing floor area, the local plan's plot ratio, storeys and height, the indicative remaining building rights with every input, building lines, and the plan's own words on demand.
- [Insurance sheet (forsikringsark)](https://grundfast.dk/vaerktoejer/forsikringsark): the buildings behind a policy on one sheet — what the registers mark (thatch, asbestos cement, listing, oil, stormflod, lavninger) first, unresolved sources said out loud, copyable as text.
- [Portfolio screening](https://grundfast.dk/vaerktoejer/portefoeljescreening): up to 50 pasted addresses washed to BFE and screened into one table, exported as CSV (signed in).
- [Property card (boligkort)](https://grundfast.dk/vaerktoejer/boligkort): the card a housing app shows for an address, with the keyed calls and SDK code that build it.

## Documentation

- [Docs home](https://grundfast.dk/docs): getting started, authentication with a `gf_live_` bearer token, endpoint overview.
- [BBR docs](https://grundfast.dk/docs/bbr): the ejendom rollup shape, field-by-field, with translated code lists.
- [API reference](https://grundfast.dk/docs/api): the OpenAPI 3.1 reference for every `/v1` endpoint.
- [SDK reference](https://grundfast.dk/docs/sdk): the typed TypeScript SDK methods, per register (live on npm: `npm i @grundfast/sdk`, ESM + CJS, zero runtime deps).
- [Webhooks](https://grundfast.dk/docs/webhooks): registering endpoints, the event catalog, payload schema, HMAC-SHA256 signature verification, and retry behavior.
- [Coordinate systems](https://grundfast.dk/docs/koordinater): WGS84 vs ETRS89 / UTM zone 32N (EPSG:25832), how the API takes and returns points, and computing in metres.
- [Guides](https://grundfast.dk/guides): task guides with working cURL, TypeScript and Python — floor area and build year, BBR units for an address, parcel and ejerlav, police/court district and parish, postcode vs municipality, CVR to property, enriching a property in one call, saving calls, insurance risk screening; and for integrations: keeping a copy of the addresses current with the change feed and webhooks, cleaning an address list (datavask A/B/C), running a whole CSV through a job, nearest address for many points, validating the delivery address before an order is saved, addresses within a radius or polygon, the open statistics, calling without a key from a fixed IP, and reading usage and quota from code.
- [Code examples (kodeeksempler)](https://grundfast.dk/kodeeksempler): ten tasks — address suggestions in checkout, washing a delivery address, GPS point to nearest address, kommune/region/police district for a point, address to BFE and cadastre, zone/local plan/building lines, addresses and buildings per postcode, floor area and build year, storm surge and cloudburst, road noise — each answered live on the page from the keyless demo endpoints, with the keyed call in cURL, TypeScript, Python and PHP.
- [Begreber](https://grundfast.dk/begreber): a Danish glossary of property-register terms (BFE, SFE, jordstykke, adgangsadresse, byggelinje, grundværdi, DVR90, bitemporality …), each linked to the endpoint that returns it. [BFE-nummer](https://grundfast.dk/begreber/bfe-nummer) has a free lookup: type an address, get the property's BFE-nummer, kommunekode and postnummer, with matrikelnummer and ejerlav on the property's page.

## English

The site is Danish; these are the English pages for the same product. Each is one half of an
hreflang pair whose Danish original is canonical for Danish-language queries.

- [Overview (English)](https://grundfast.dk/en): what Grundfast serves — the registers, the BFE key, the SLA mirror.
- [DAWA replacement (English)](https://grundfast.dk/en/dawa-replacement): every DAWA surface mapped to a live /v1 endpoint, with the date DAWA closed and its primary sources.
- [Datafordeler alternative (English)](https://grundfast.dk/en/datafordeler-alternative): the six things about the upstream API that Grundfast absorbs.
- [Property data API (English)](https://grundfast.dk/en/property-data-api): what one lookup on a BFE number returns across the registers — buildings, parcel, valuation, soil, protection lines and zoning.
- [BBR API (English)](https://grundfast.dk/en/bbr-api): BBR buildings and units by BFE number — use, year built and rebuilt, areas, materials, heating, heritage status, code lists.
- [Cadastre API (English)](https://grundfast.dk/en/cadastre-api): Matriklen parcels per property — parcel number, ejerlav, area and WGS84 boundary.
- [Address API (English)](https://grundfast.dk/en/address-api): autocomplete, UUID lookup, address washing, reverse geocoding, postal codes and street names from DAR.
- [Address autocomplete API (English)](https://grundfast.dk/en/address-autocomplete-api): typo-tolerant type-ahead over every Danish address, with UUID and BFE on each suggestion.
- [Reverse geocoding API (English)](https://grundfast.dk/en/reverse-geocoding-api): a WGS84 point to the parcel and BFE number under it, or to the nearest addresses by distance.
- [MCP server (English)](https://grundfast.dk/en/mcp-server): the thirty-four MCP tools, how to connect, and why it is read-only.
- [Pricing (English)](https://grundfast.dk/en/pricing): the metered per-call plans and what counts as a call.

## Company

- [About](https://grundfast.dk/om): what Grundfast is, why it exists, and how the SLA-mirror over Datafordeler's open data works.
- [Contact](https://grundfast.dk/kontakt): how to reach Grundfast for migration help, the Enterprise contract, and support.
- [Changelog](https://grundfast.dk/changelog): reverse-chronological log of shipped capabilities + the versioning policy.

## Legal

- [Terms of service](https://grundfast.dk/handelsbetingelser)
- [Privacy policy](https://grundfast.dk/privatlivspolitik)
- [Data processing agreement](https://grundfast.dk/databehandleraftale)
- [Cookie policy](https://grundfast.dk/cookies)