Acceptable Use Policy

Best Practices for XML Based Feeds V1.2.


Target Audience

This document is intended for third party web developers/application developers, seeking to use the XML based integration services hosted on the website


The purpose of the document is to outline best practices when obtaining data from dezrez web services, and to inform third parties about the automated blacklisting system that we have in place.

Dezrez web services information

For detailed information about the web services that dezrez offer for third party integrators, please see the documentation hosted here


Do I need to pause between requests?

We recommend so, yes. Leave an appropriate amount of “stand-off” time between batches of requests. We recommend introducing a 100ms delay between individual requests. Repeated back-to-back requests (“Hammering”) is very likely to trigger to automated filter.

What happens if I am “throttled”?

When the automated system detects an excessive amount of requests that fall foul of these guidelines, it may introduce one of the following sanctions:

  • Time delay in response

    • This delay may increase if behaviour continues

  • Temporary suspension

    • Requests will return HTTP status code 429 (Too Many Requests), and a plain text message explaining what has happened

  • Permanent suspension

    • Requests will return HTTP status code 403 (Forbidden), and a web form that explains what has happened and why. This form can be submitted to appeal the suspension.

Do I need to store the update date locally?

Yes – This will allow you to determine if the information you hold is out of date when comparing the updated date we provide in the search results.

How can I appeal against a blacklisting decision?

If the automated system has blacklisted your API key or your IP address, when you make a request to our web services, a web form is shown – fill this form in and submit it in order to appeal the blacklisting. Alternatively, you may contact us via email –

Proceed to order!

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