500 trial credits · No credit card required

Immoweb Energy observations API

Read source energy labels and explicit values saved with your listing observation. Get structured JSON through one RealtyCrawl API key.

Get an API key View documentation

Use your account’s listing_id. Read only the source labels or numeric values actually retained with that search or detail observation. Literal labels preserve their original rating system; missing units and issue dates stay null. This is not an independently verified certificate. This operation reads an account-owned retained observation. It does not refresh the source; inspect its collection time and retention limits. Check live capabilities for accepted inputs and availability before running your request.

Immoweb API

What can you do with the Energy observations API?

Read source energy labels and explicit values saved with your listing observation.

Example request

curl --request GET 'https://realtycrawl.dev/v1/listings/YOUR_LISTING_ID/energy' \
  --header "x-api-key: $REALTYCRAWL_API_KEY" \
  --header 'X-Max-Credits: 1'

import os
import json
import requests

headers = {
  "X-Max-Credits": "1"
}
headers["x-api-key"] = os.environ["REALTYCRAWL_API_KEY"]

response = requests.request("GET", "https://realtycrawl.dev/v1/listings/YOUR_LISTING_ID/energy",
    headers=headers, timeout=60)
response.raise_for_status()
print(json.dumps(response.json(), indent=2))

const response = await fetch("https://realtycrawl.dev/v1/listings/YOUR_LISTING_ID/energy", {
  method: "GET",
  headers: {
    "x-api-key": process.env.REALTYCRAWL_API_KEY,
    ...{
      "X-Max-Credits": "1"
    }
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
console.log(await response.json());

Parameters

Parameters for Immoweb Energy observations API
Parameter	Required	Description
listing_id	Yes	listing_id
fields	No	Response-only comma-separated field paths relative to data items; up to 32 paths. Source requests and billing are unchanged.
format	No	Response-only export format. JSON retains the envelope; CSV/NDJSON contain data records, with request/credit metadata in headers. Errors stay JSON.

Example response

What does the Immoweb Energy observations API return?

The response includes retained source energy observations in data, plus source outcomes and request metadata. Explore the structure below before making a call.

Illustrative response

{
  "data": {
    "certificates": [
      {
        "kind": "epc",
        "rating": "A",
        "value": null,
        "unit": null,
        "issued_at": null,
        "source": {
          "platform": "immoweb",
          "provider": "example",
          "country": "BE",
          "native_id": "EXAMPLE_LISTING_ID",
          "observed_at": "2026-01-01T12:00:00Z",
          "access_class": "public_portal"
        }
      }
    ],
    "origin": "source_reported",
    "completeness": "unknown",
    "source": {
      "platform": "immoweb",
      "provider": "example",
      "country": "BE",
      "native_id": "EXAMPLE_LISTING_ID",
      "observed_at": "2026-01-01T12:00:00Z",
      "access_class": "public_portal"
    }
  },
  "meta": {
    "request_id": "example_request",
    "schema_version": "1.0.0",
    "generated_at": "2026-01-01T12:00:00Z",
    "completeness": "unknown",
    "sources": []
  }
}

Schema example with placeholder values; not a live source result. Actual fields, values, and completeness vary by source and request.

API details

How does the Immoweb Energy observations API work?

Send a GET request with your API key and accepted inputs. RealtyCrawl returns structured JSON and preserves the source context for your application.

Method

GET

Response

JSON · CSV · NDJSON

GET /v1/listings/{listing_id}/energy

Why RealtyCrawl

Why use RealtyCrawl for Immoweb Energy observations?

Keep source collection behind a shared interface so you can focus on the product you’re building.

One API key for supported operations across the RealtyCrawl catalog.
Operation-specific source fields returned in a common JSON schema.
Source identifiers, timestamps, and completeness metadata stay with the result.
1 credits per successful call, with failed calls refunded.

Developer first

How do you bring real estate data into your app?

Use familiar HTTP requests, inspect a common schema, and connect the results to the tools your team already uses.

One key, many sources

Use the same credential across supported operations and check capabilities for each source.

Property data with context

Keep currencies, area units, source identifiers, and observation times with your results.

Your language, your workflow

Call the API with cURL, Python, TypeScript, or any backend that can send an HTTP request.

PythonTypeScript{ }cURL

import requests

# Check current source availability before collecting.
response = requests.get(
    'https://realtycrawl.dev/v1/meta/capabilities',
    params={'platform': 'zillow'}
)
response.raise_for_status()
capabilities = response.json()

// Check current source availability before collecting.
const response = await fetch(
  'https://realtycrawl.dev/v1/meta/capabilities?platform=zillow'
);
if (!response.ok) throw new Error('Request failed');
const capabilities = await response.json();

curl 'https://realtycrawl.dev/v1/meta/capabilities?platform=zillow'

import requests

# Check current source availability before collecting.
response = requests.get(
    'https://realtycrawl.dev/v1/meta/capabilities',
    params={'platform': 'redfin'}
)
response.raise_for_status()
capabilities = response.json()

// Check current source availability before collecting.
const response = await fetch(
  'https://realtycrawl.dev/v1/meta/capabilities?platform=redfin'
);
if (!response.ok) throw new Error('Request failed');
const capabilities = await response.json();

curl 'https://realtycrawl.dev/v1/meta/capabilities?platform=redfin'

import requests

# Check current source availability before collecting.
response = requests.get(
    'https://realtycrawl.dev/v1/meta/capabilities',
    params={'platform': 'realtor'}
)
response.raise_for_status()
capabilities = response.json()

// Check current source availability before collecting.
const response = await fetch(
  'https://realtycrawl.dev/v1/meta/capabilities?platform=realtor'
);
if (!response.ok) throw new Error('Request failed');
const capabilities = await response.json();

curl 'https://realtycrawl.dev/v1/meta/capabilities?platform=realtor'

import requests

# Check current source availability before collecting.
response = requests.get(
    'https://realtycrawl.dev/v1/meta/capabilities',
    params={'platform': 'rightmove'}
)
response.raise_for_status()
capabilities = response.json()

// Check current source availability before collecting.
const response = await fetch(
  'https://realtycrawl.dev/v1/meta/capabilities?platform=rightmove'
);
if (!response.ok) throw new Error('Request failed');
const capabilities = await response.json();

curl 'https://realtycrawl.dev/v1/meta/capabilities?platform=rightmove'

import requests

# Check current source availability before collecting.
response = requests.get(
    'https://realtycrawl.dev/v1/meta/capabilities',
    params={'platform': 'idealista'}
)
response.raise_for_status()
capabilities = response.json()

// Check current source availability before collecting.
const response = await fetch(
  'https://realtycrawl.dev/v1/meta/capabilities?platform=idealista'
);
if (!response.ok) throw new Error('Request failed');
const capabilities = await response.json();

curl 'https://realtycrawl.dev/v1/meta/capabilities?platform=idealista'

Capability excerpt · illustrative

{
  "platform": "zillow",
  "operation": "searchPlatformListings",
  "status": "active",
  "geographies": [
    "US"
  ],
  "execution": "sync"
}

{
  "platform": "redfin",
  "operation": "searchPlatformListings",
  "status": "active",
  "geographies": [
    "US"
  ],
  "execution": "sync"
}

{
  "platform": "realtor",
  "operation": "searchPlatformListings",
  "status": "active",
  "geographies": [
    "US"
  ],
  "execution": "sync"
}

{
  "platform": "rightmove",
  "operation": "searchPlatformListings",
  "status": "active",
  "geographies": [
    "GB"
  ],
  "execution": "sync"
}

{
  "platform": "idealista",
  "operation": "searchPlatformListings",
  "status": "active",
  "geographies": [
    "ES"
  ],
  "execution": "sync"
}

ZillowRedfinRealtor.comRightmoveIdealistaBrowse the platform catalog

FAQ

Have a question?
We got answers

Find answers to common questions about Immoweb requests, responses, and credits.

How can I try the Immoweb Energy observations API?

Create an account for 500 trial credits, check live capabilities for Immoweb, and use the example request above with your API key. This operation lists 1 credits per successful call.

What does the Energy observations API return?

The JSON response contains retained source energy observations in data. The meta object carries request diagnostics and source outcomes. CSV/NDJSON exports contain data records with request and credit metadata in headers.

Where do I put the request parameters?

Is this endpoint available for every market?

Availability is operation-specific. Check /v1/meta/capabilities for the platform’s live status, accepted selectors, and markets. Unavailable requests are not charged.

Is this an official Immoweb endpoint?

RealtyCrawl is an independent real estate data API and is not affiliated with Immoweb.