> 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/platform/monthly-subscriptions.md).

# Monthly subscriptions

The costs for the Platform are determined on the basis of the use of the data products or APIs. 

**An overview** 

* There is a free trial with 15 credits
* There are pay per use subscriptions for unlimited use starting at 100 credits for € 0.47 per API call excl. VAT. 
* There is a separate subscription for the Kadaster transaction API, with 100 credits and a pay per use price of € 0,75 per API call excluding VAT. 
* There is a possibility to take out prepaid credits for a lower price per API call.

**Reward sustainable use**

It is fair to reward customers sustainably when taking out a Prepaid subscription whereby the Pay per use rate remains reduced even after the use of the Prepaid credits. This makes it attractive to scale in the use of the services.

**An overview of the subscriptions in one table**

The prepaid subscription is paid in advance at the beginning of the month and any usage above the number of included API calls will be settled on the next invoice. The subscriptions can be canceled monthly and can be changed in the meantime during the current month. 

**Pricing Table Altum AI API Subscriptions:**

The subscriptions include the Housing Value API, Sustainability API and WOZ API.

| Prepaid cost p/m | API calls included | Per API call |
| ---------------- | ------------------ | ------------ |
| € 47             | 100                | € 0,47       |
| € 85             | 250                | € 0,34       |
| € 200            | 750                | € 0,267      |
| € 390            | 2.000              | € 0,195      |

**Price table Kadaster transaction API subscriptions**

The subscriptions for the Kadaster transaction API.

| Prepaid costs p/m | API calls included | Per API call |
| ----------------- | ------------------ | ------------ |
| € 75              | 100                | € 0,75       |

Please note: All amounts mentioned are exclusive of VAT.


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