Connectivity

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://gbmapi.bl2020.com/dataseries?seriesid=1&country=DE&startyear=2020&endyear=2025"

import requests

response = requests.get(
    "https://gbmapi.bl2020.com/dataseries",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    params={
        "seriesid": 1,
        "country": "DE",
        "startyear": 2020,
        "endyear": 2025
    }
)
data = response.json()
print(f"Series: {data['seriesname']}, Country: {data['country']}")
for point in data["data"]:
    print(f"  {point['date']}: {point['value']}")

const response = await fetch(
  "https://gbmapi.bl2020.com/dataseries?seriesid=1&country=DE&startyear=2020&endyear=2025",
  { headers: { "Authorization": "Bearer YOUR_API_KEY" } }
);
const data = await response.json();
console.log(`Series: ${data.seriesname}, Country: ${data.country}`);
data.data.forEach(p => console.log(`  ${p.date}: ${p.value}`));

let
    Source = Json.Document(
        Web.Contents("https://gbmapi.bl2020.com/dataseries", [
            Headers = [Authorization = "Bearer YOUR_API_KEY"],
            Query = [seriesid = "1", country = "DE", startyear = "2020", endyear = "2025"]
        ])
    ),
    ToTable = Table.FromRecords(Source[data])
in
    ToTable

RESTful JSON Endpoints

Clean, well-structured JSON responses for all GBM data series. Query single or multiple dataseries by country and time range.

OpenAPI Specification

Machine-readable OpenAPI spec available for automatic client generation in any language. Generate type-safe clients with standard tooling.

Interactive Docs

Interactive API documentation, request/response schemas, and parameter descriptions for every endpoint.

Catalog & Metadata

Browse available catalogs, series, frequencies, and units via dedicated endpoints. Filter dataseries by catalog attributes to find exactly the data you need.

Bearer Token Authentication

Simple Bearer token authentication. API key provisioned directly in the MILAN Portal with your Continent or Global package.

Flexible Queries

Request single or multiple dataseries at once. Filter by country, year range, and month range. Retrieve data for multiple countries and series in a single call.

API Key Provisioning

An API key is provided directly in the MILAN Portal once you have booked a package starting from Continent. API access is included in the Continent and Global packages. No additional cost for API usage.

Direct API Connection

The connector communicates directly with the GBM API. No intermediate files, no manual exports. Data flows from our database to your dashboard.

Automatic Updates

When GBM publishes new quarterly data, your dashboards update automatically on the next scheduled refresh. No action required.

All Metrics & Countries

Access every GBM data point: permits, completions, volumes, macro drivers — for all 170 countries. Filter and combine as needed.

Scheduled Refreshes

Configure daily, weekly, or custom refresh schedules in Power BI Service. Ideal for automated reporting workflows.

No Coding Required

Point-and-click setup. Select countries and metrics from dropdown menus. Build dashboards using the standard Power BI interface.

Works with Power BI Service

Full support for Power BI Desktop and Power BI Service. Publish dashboards to your organization and share with colleagues.

Ready-to-Use Template

Download and start immediately. Pre-configured Power Query connections for all GBM data series.

Power Query M-Code

All data connections use native Power Query M-Code. Fully transparent, editable, and extensible.

No VBA, No Macros

Pure Power Query — no security warnings, no macro permissions needed. IT-friendly and audit-compliant.

Excel 2019+ & M365

Compatible with Excel 2019, 2021, and Microsoft 365. Works on Windows and Mac (M365).

Works Offline

After initial data load, the spreadsheet works fully offline. Refresh when you need updated data.

Customizable Queries

Modify Power Query parameters to select specific countries, building types, or time periods. Adapt to your exact needs.

Power BI & Excel

Every template is available in two formats: as a .pbix file for Power BI Desktop and as a Living Excel workbook. Choose the tool your team prefers.

Best-Practice Visualizations

Designed by data visualization experts. Each template follows best practices for construction market analysis — clear, actionable, presentation-ready.

Fully Customizable

Every template is fully editable. Add your company branding, modify charts, add new pages, combine with your internal data sources.

Regular Updates

We continuously add new templates based on customer feedback. Existing templates are updated with improved visualizations and new features.