# Authentication, input and response

## Request housing features for Dutch residential properties

{% tabs %}
{% tab title="V2" %}

<mark style="color:green;">`POST`</mark> `https://api.altum.ai/v2/objectdata`

#### Headers

| Name                                        | Type   | Description                                                                 |
| ------------------------------------------- | ------ | --------------------------------------------------------------------------- |
| x-api-key<mark style="color:red;">\*</mark> | string | Unique API Key from Altum. Create one via Mopsus(<https://mopsus.altum.ai>) |
| Content-Type                                | string | application/json                                                            |

#### Request Body

| Name                                          | Type   | Description                                                                  |
| --------------------------------------------- | ------ | ---------------------------------------------------------------------------- |
| postcode<mark style="color:red;">\*</mark>    | string | Zipcode of the object                                                        |
| housenumber<mark style="color:red;">\*</mark> | number | House number of the object                                                   |
| houseaddition                                 | string | House letter and addition of the object                                      |
| valuation\_date                               | string | Enter as YYYYMMDD, gives newest transaction till that date. Default is TODAY |

{% tabs %}
{% tab title="200: OK Successful response" %}

```
{
		"bag_id": 363010000710354,
		"postcode": "1011EW",
		"housenumber": 48,
		"houseaddition": null,
		"valuation_date": "20240104",
		"city": "Amsterdam",
		"street": "Koningsstraat",
		"house_type_generic": "Huis",
		"house_type_specific": "Tussen/rijwoning",
		"type_house_construction": "Herenhuis, tussenwoning",
		"building_status": "Pand in gebruik",
		"inner_surface_area": 216.0,
		"outer_surface_area": 76.0,
		"build_year": 1906,
		"volume": 548.0,
		"rooms": 8,
		"number_of_bathrooms": 3,
		"garden_orientation": null,
		"garden_size": null,
		"garden_location": "Achtertuin",
		"monument": 0,
		"monument_description": "Geen monument / Onbekend",
		"longitude": 4.902011945627775,
		"latitude": 52.37216745876808,
		"neighbourhood_code": "BU03630404",
		"neighbourhood_name": "Nieuwmarkt",
		"municipality_code": "GM0363",
		"municipality_name": "Amsterdam",
		"province": "Noord-Holland",
		"use_ownership": "V",
		"rent_ownership": "E",
		"rent_ownership_class": 4.5,
		"ozb_tax": 0.0431,
		"waste_tax_one_person": 22.72,
		"waste_tax_more_persons": 330.34,
		"sewage_tax_one_person": 440.18,
		"sewage_tax_more_persons": 160.43,
		"protected_cityviews": 2,
		"protected_cityview_names": "['Amsterdam - Binnen de Singelgracht', 'Amsterdam - Nieuwmarktbuurt']"
}
```

{% endtab %}

{% tab title="400: Bad Request Unsuccessful response" %}

```
{
  "output": "The given house address not found in database, the combination of Post Code, House Number and House Addition does not exist."
}

{
  "output": "We are not able to provide data at the moment."
}
```

{% endtab %}

{% tab title="422: Unprocessable Entity Wrong input" %}

```
{
	"detail": [
		{
			"loc": [
				"body",
				43
			],
			"msg": "Expecting value: line 3 column 18 (char 43)",
			"type": "value_error.jsondecode",
			"ctx": {
				"msg": "Expecting value",
				"doc": "{\n  \"postcode\": \"2201PZ\",\n  \"housenumber\": a,\n  \"valuationdate\": \"20121001\"\n}",
				"pos": 43,
				"lineno": 3,
				"colno": 18
			}
		}
	]
}
```

{% endtab %}

{% tab title="500: Internal Server Error Service is not available and/or down" %}

```
{
	"message": "Internal server error"
}
```

{% endtab %}

{% tab title="403: Forbidden Forbidden" %}

```
{
	"message": "Missing Authentication Token"
}
```

{% endtab %}

{% tab title="401: Unauthorized No access" %}

```
{
    'output': 'Please use https://api.altum.ai or visit https://mopsus.altum.ai to make your request.'
}
```

{% endtab %}
{% endtabs %}

## Request body

#### Example request

```
{
  "postcode": "2201PZ",
  "housenumber": 11,
  "valuation_date": "20221001"
}
```

{% endtab %}

{% tab title="V1" %}

<mark style="color:green;">`POST`</mark> `https://api.altum.ai/objectdata`

#### Headers

| Name                                        | Type   | Description                                                                 |
| ------------------------------------------- | ------ | --------------------------------------------------------------------------- |
| x-api-key<mark style="color:red;">\*</mark> | string | Unique API Key from Altum. Create one via Mopsus(<https://mopsus.altum.ai>) |
| Content-Type                                | string | application/json                                                            |

#### Request Body

| Name                                          | Type   | Description                                                                  |
| --------------------------------------------- | ------ | ---------------------------------------------------------------------------- |
| postcode<mark style="color:red;">\*</mark>    | string | Zipcode of the object                                                        |
| valuationdate                                 | string | Enter as YYYYMMDD, gives newest transaction till that date. Default is TODAY |
| houseaddition                                 | string | House letter and addition of the object                                      |
| housenumber<mark style="color:red;">\*</mark> | number | House number of the object                                                   |

{% tabs %}
{% tab title="200: OK Successful response" %}

```
{
	"Output": {
		"bag_id": "0363010000710354",
		"postcode": "1011EW",
		"housenumber": "48",
		"houseaddition": "None",
		"valuation_date": "20240104",
		"city": "Amsterdam",
		"street": "Koningsstraat",
		"house_type_generic": "Tussen/rijwoning",
		"house_type_specific": "None",
		"type_house_construction": "Herenhuis, tussenwoning",
		"building_status": "Pand in gebruik",
		"inner_surface_area": "216.0",
		"outer_surface_area": "76.0",
		"build_year": "1906.0",
		"volume": "548.0",
		"rooms": "8.0",
		"number_of_bathrooms": "3.0",
		"garden_orientation": "None",
		"garden_size": "None",
		"garden_location": "Achtertuin",
		"monument": "0",
		"monument_description": "Geen monument / Onbekend",
		"longitude": "4.902011945627775",
		"latitude": "52.37216745876808",
		"neighbourhood_code": "BU03630404",
		"neighbourhood_name": "Nieuwmarkt",
		"municipality_code": "363.0",
		"municipality_name": "Amsterdam",
		"province": "Noord-Holland",
		"use_ownership": "V",
		"rent_ownership": "E",
		"rent_ownership_class": "4.5",
		"ozb_tax": "0.0431",
		"waste_tax_one_person": "22.72",
		"waste_tax_more_persons": "330.34",
		"sewage_tax_one_person": "440.18",
		"sewage_tax_more_persons": "160.43",
		"protected_cityviews": "2",
		"protected_cityview_names": "['Amsterdam - Binnen de Singelgracht', 'Amsterdam - Nieuwmarktbuurt']"
	}
}
```

{% endtab %}

{% tab title="400: Bad Request Unsuccessful response" %}

```
{
  "Output": "The given house address not found in database, the combination of Post Code, House Number and House Addition does not exist."
}

{
  "Output": "We are not able to provide data at the moment."
}
```

{% endtab %}

{% tab title="422: Unprocessable Entity Wrong input" %}

```
{
	"detail": [
		{
			"loc": [
				"body",
				43
			],
			"msg": "Expecting value: line 3 column 18 (char 43)",
			"type": "value_error.jsondecode",
			"ctx": {
				"msg": "Expecting value",
				"doc": "{\n  \"postcode\": \"2201PZ\",\n  \"housenumber\": a,\n  \"valuationdate\": \"20121001\"\n}",
				"pos": 43,
				"lineno": 3,
				"colno": 18
			}
		}
	]
}
```

{% endtab %}

{% tab title="500: Internal Server Error Service is not available and/or down" %}

```
{
	"message": "Internal server error"
}
```

{% endtab %}

{% tab title="403: Forbidden Forbidden" %}

```
{
	"message": "Missing Authentication Token"
}
```

{% endtab %}

{% tab title="401: Unauthorized No access" %}

```
{
    'Output': 'Please use https://api.altum.ai or visit https://mopsus.altum.ai to make your request.'
}
```

{% endtab %}
{% endtabs %}

## Request body

#### Example request

```
{
  "postcode": "2201PZ",
  "housenumber": 11,
  "valuationdate": "20221001"
}
```

{% endtab %}
{% endtabs %}


---

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.altum.ai/english/property-data/housing-features-api/authentication-input-and-response.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.