> For the complete documentation index, see [llms.txt](https://docs.altum.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.altum.ai/english/master.md).

# Altum AI API documentation

Documentation for integration and explanation of the API's of Altum AI, with JSON sample code for model valuation, sustainability and Kadaster transactions.

## Start building today

Start building your own custom tooling, website and customer journey with the API's of Altum AI accessing the proprietary automated model valuation, sustainability advice, Kadaster transactions and much more data.

Integrating the API's is an easy process with our clear documentation and sample code in JSON.

{% hint style="success" %}
Create a **free account** via Altum AI's [Platform](https://platform.altum.ai/auth) to get your API key
{% endhint %}

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-type="content-ref"></th><th data-type="files"></th></tr></thead><tbody><tr><td><strong>Sustainability API</strong></td><td>Generate sustainability advice</td><td>Estimate current and potential NTA 8800 energylabel</td><td><a href="/english/sustainability/sustainability-api.md">Sustainability API</a></td><td></td></tr><tr><td><strong>AVM API</strong></td><td>Market valuations of residential properties. </td><td>Extract object data such as house type and surfaces</td><td><a href="/english/property-valuation-and-market/avm-api.md">AVM API</a></td><td></td></tr><tr><td><strong>WOZ API</strong></td><td>Fetch the latest WOZ value from the WOZwaardeloket</td><td>The WOZ API can search based on address or the BAG ID</td><td><a href="/english/property-data/woz-api.md">WOZ API</a></td><td></td></tr><tr><td><strong>Interactive reference API</strong></td><td>Find relevant recent transactions to support the valuation</td><td>As an appraiser, use extensive configurable features to find up to 30 comparable sales</td><td><a href="/english/property-valuation-and-market/interactive-reference-api.md">Interactive Reference API</a></td><td></td></tr><tr><td><strong>Kadaster transaction API</strong></td><td>Retrieve the transaction details such as price from Kadaster</td><td>PING freely for availability of the transaction</td><td><a href="/english/property-valuation-and-market/kadaster-transaction-api.md">Kadaster Transaction API</a></td><td></td></tr><tr><td><strong>Condition score API</strong></td><td>Estimate condition score of bathrooms and kitchens</td><td>Get an unbiased score ranging from 1 to 5</td><td><a href="/english/property-valuation-and-market/condition-score-api.md">Condition score API</a></td><td></td></tr></tbody></table>

{% hint style="info" %}
Find all available API's in the sidebar on the left
{% endhint %}


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