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  • Altum AI API documentation
  • Platform
    • Monthly subscriptions
    • Yearly subscriptions
    • Unlimited usage subscriptions
    • Kadaster Transaction API subscription
    • Changelog
  • Updates
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    • Perform your first API call
    • Credit API
    • Sandbox
    • OpenAPI specifications
    • GET API status
  • Altum AI website
  • Pricing
  • Property AI
    • Authentication, Input, and Response
    • Output Interpretation
    • FAQs
  • API's
    • AVM API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • Accuracy Indicator
      • House numbers & additions
      • House types
      • Variables
      • Output interpretation
      • Frequently Asked Questions (FAQ)
    • AVM+ API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • House numbers, letters & additions
      • Energylabel and Inner and Outer Surface Area
      • Output interpretation
    • Listing Price API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • House numbers, letters & additions
      • Inner and Outer Surface Area
      • Output interpretation
    • Sustainability API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • Energylabel
      • Improving the advice
      • Example API calls
      • Output interpretation
      • Increasing energy costs
      • Exclude measures
      • Search criteria
      • Measures
      • Insulation values
      • Comfort score
      • CO2
      • Coverage
      • Cost table input
      • Frequently Asked Questions (FAQ)
    • NTA 8800 Energylabel API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • EPC API
      • Changelog
      • API Key Information
      • Authentication, input and response
      • Output Interpretation
    • Energylabel insights API
      • ChangeLog
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • WOZ API
      • Changelog
      • Frequently Asked Questions (FAQ)
      • Authentication, input and response
      • API Key Information
      • Output interpretation
      • PC6 average WOZ value
    • Interactive Reference API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • Visual similarity search
      • House types
      • Comparable functions
      • Output interpretation
    • Kadaster Transaction API
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Housing features API
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Contents Value API
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Building geometry API
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Energy & climate API
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Condition score API
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Photo Labelling API
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Autosearch API
      • Authentication, input and response
      • API Key Information
    • Autosuggest API
      • Authentication, input and response
      • API Key Information
      • Fuzzy Search Support
      • Output interpretation
    • Move data API
      • ChangeLog
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Location Data API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • House types
      • Output interpretation
    • Rental Reference API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Rebuild Value API
      • Changelog
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • Solar panel roof scan API
      • Authentication, input and response
      • API Key Information
      • Output interpretation
    • WWS Points API
      • Authentication, input and response
      • API Key Information
      • Specifications for independent home version 01-01-2024
      • Specifications for non-independent home version 01-01-2024
      • Specifications for independent home version 01-07-2024
      • Specifications for non-independent home version 01-07-2024
      • Input explanation for version 01-07-2024
      • Output interpretation
  • API error codes
    • 429
    • 422
    • 403
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Kadaster Transaction API subscription

The Platform provides access to the Kadaster Transaction API with a separate pay-per-use subscription.

PreviousUnlimited usage subscriptionsNextChangelog

Last updated 1 year ago

What is the Kadaster Transaction API?

The Transaction API is a paid service where transaction data can be requested from the Kadaster for a home. Check out the documentation below.

Why is there a separate subscription for this API?

The costs for requesting transaction data and purchase price information are higher than for the other APIs that Altum AI offers.

How does pay per use work for the Transaction API?

With pay per use it is possible to make unlimited use of Altum AI's Transaction API. Each API call costs one credit, and a credit costs € 0,75 exclusive of VAT. The Pay per use usage is tracked in the Dashboard and settled monthly in arrears.

How do I avoid unnecessary costs when using the API?

Eg. if no transaction is (yet) known. It is possible to 'ping' the Transaction API on the presence of the requested data. To do this, send an API call as usual, only not on api.altum.ai/transaction but on api.altum.ai/transaction/ping. With a positive feedback on this request, you can run the API call at the usual URL. The use of the ping function is unlimited and is not counted as paid usage.

Kadaster Transaction API