Engineering activities for technical building equipment companies in Köln

Köln ·Currently listed companies in the Engineering activities for technical building equipment industry headquartered in Köln.

246 companies · 1–20 of 246

3BX GmbH GmbH · HRB 114050 Köln (Cologne) · 2023
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485Grad GmbH GmbH · HRB 80000 Köln (Cologne) · 2013
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4sound GmbH GmbH · HRB 73230 Köln (Cologne) · 2011
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A + B Tank- und Anlagentechnik GmbH GmbH · HRB 51256 Köln (Cologne) · 2003
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a+m Architekten Ingenieure GmbH GmbH · HRB 110654 Köln (Cologne) · 2022
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A.S. Connect UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 124842 Köln (Cologne) · 2025
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ACCON Köln GmbH Ingenieurbüro für Schall- und Schwingungstechnik GmbH · HRB 29247 Köln (Cologne) · 1997
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Achenbach & Partner Ingenieurgesellschaft mbH GmbH · HRB 119737 Köln (Cologne) · 2024
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Actemium Fördertechnik Rheinland GmbH GmbH · HRB 79413 Köln (Cologne) · 2013
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AIRTEC Ingenieurgesellschaft mbH GmbH · HRB 22834 Köln (Cologne) · 1992
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AirZoneTec GmbH GmbH · HRB 113945 Köln (Cologne) · 2023
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AKSiTEM Technisches Eventmanagement GmbH GmbH · HRB 86386 Köln (Cologne) · 2016
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All41 GmbH GmbH · HRB 112189 Köln (Cologne) · 2022
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Alpha Engineering Verfahrenstechnik GmbH GmbH · HRB 19428 Köln (Cologne) · 1989
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AMM Architekturbüro Markus Müller Planung GmbH GmbH · HRB 96812 Köln (Cologne) · 2019
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AmpedUp Engineering GmbH & Co. KG GmbH & Co. KG · HRA 36984 Köln (Cologne) · 2023
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Anschlusskraft GmbH GmbH · HRB 123703 Köln (Cologne) · 2025
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APAK GmbH GmbH · HRB 112793 Köln (Cologne) · 2022
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Apleona Wolfferts GmbH GmbH · HRB 21911 Köln (Cologne) · 1991
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ASG Lufttechnik GmbH GmbH · HRB 111620 Köln (Cologne) · 2022
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All industries in Köln

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&filters={"city":"Köln","industry_code":"71.12.3","industry_scheme":"WZ2025"}

# pip install handelsregister
from handelsregister import Handelsregister

client = Handelsregister(api_key="YOUR_API_KEY")  # or set HANDELSREGISTER_API_KEY
page = client.search_organizations(
    filters={
        "city": "Köln",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit=20,
    skip=0,
)
print(page["total"])
for item in page["results"]:
    print(item["name"], item["registration"]["register_number"])

// npm install handelsregister
import { Handelsregister } from 'handelsregister';

const client = new Handelsregister('YOUR_API_KEY'); // or set HANDELSREGISTER_API_KEY
const page = await client.searchOrganizations({
  filters: {
      "city": "Köln",
      "industry_code": "71.12.3",
      "industry_scheme": "WZ2025"
  },
  limit: 20,
  skip: 0,
});
console.log(page.total);
for (const item of page.results) {
  console.log(item.name, item.registration.register_number);
}

// npm install handelsregister
const { Handelsregister } = require('handelsregister');

const client = new Handelsregister(process.env.HANDELSREGISTER_API_KEY);
(async () => {
  const page = await client.searchOrganizations({
    filters: {
        "city": "Köln",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit: 20,
    skip: 0,
  });
  console.log(page.total);
  for (const item of page.results) {
    console.log(item.name, item.registration.register_number);
  }
})();

curl 'https://handelsregister.ai/api/v1/search-organizations?limit=20' \
  -H 'x-api-key: YOUR_API_KEY' \
  -G --data-urlencode 'filters={"city":"Köln","industry_code":"71.12.3","industry_scheme":"WZ2025"}'

{
    "results": [
        {
            "entity_id": "<32-char hex>",
            "name": "<string>",
            "registration": {
                "court": "<string>",
                "register_type": "<string>",
                "register_number": "<string>"
            },
            "address": {
                "house_number": "<string>",
                "street": "<string>",
                "postal_code": "<string>",
                "city": "<string>",
                "county": "<string>",
                "state": "<string>",
                "country": "<ISO country>",
                "coordinates": {
                    "latitude": "<float>",
                    "longitude": "<float>"
                }
            },
            "registration_date": "<ISO date>",
            "purpose": "<string>"
        }
    ],
    "total": "<int>",
    "meta": {
        "request_credit_cost": "<int>",
        "credits_remaining": "<int>"
    }
}

results[]

entity_id string

Stable 32-char hex identifier. Pass straight into /fetch-organization as `q`.

name string

Registered company name.

registration object

address object

Postal address with street, house_number, postal_code, city, county, state, country and coordinates (latitude/longitude).

registration_date date

Initial entry into the commercial register (ISO date).

purpose string

Stated business purpose (Unternehmensgegenstand).

top-level

total integer

Total result count for pagination.

meta.request_credit_cost integer

Credits actually charged for this call.

meta.credits_remaining integer

Account credit balance remaining after this call.

Location · Industry · Legal form · Full-text

Filters & master data — via search-organizations

City, industry, legal form, registration date: every argument combinable through the filters parameter. One REST endpoint, every German company.

Location & geo Filter by city, postal code, state and county through city, postal_code, state and county.
Industry (WZ2025) Industry segmentation via the official WZ2025 codes — industry_code combined with industry_scheme.
Legal form GmbH, AG, KG, OHG and more via legal_form_code.
Company size bs_company_size_category – small, medium, large based on balance-sheet totals.
Active status Restrict to active entries or include deleted companies via active.
Registration date Date ranges via registration_date_from and registration_date_to.
Full-text search Free-text query via the q parameter (min. 2 characters).
Pagination skip and limit (up to 30 results per call) for deep lists.
Master data per result entity_id, name, address, registration and registration_date – pass entity_id straight to /fetch-organization.

Run every filter live with an API key. Get an API key →

Code · AI-Agents · No-Code · Workflows

Drops into any stack

The search-organizations API speaks every mainstream client: REST, Python, Node, MCP for AI agents, n8n and webhook platforms.

REST API Simple GET request with the X-API-KEY header and JSON-encoded filters. Python requests, httpx or your favourite library — pass filters via json.dumps. Node.js fetch or axios with URLSearchParams. Works in edge, worker and browser runtimes. MCP Server Directly in Claude, Cursor or any MCP-aware AI client as the search_organizations tool. n8n Pre-built custom node for workflow automation — city, industry and size as filter inputs. Webhook Callable from Zapier, Make or any other webhook platform.

This list in your app

Grab an API key and filter every German company by city, industry, size and more — straight from your application. One REST endpoint, every result.

Get an API key

Filters & master data — via search-organizations

Drops into any stack

This list in your app

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