> For the complete documentation index, see [llms.txt](https://docs.keyfax.biz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.keyfax.biz/integrations/host-systems/aareon/soap-based-integration.md).

# SOAP based integration

From **QL v4.7** or newer QL integration can interface with Keyfax using the [SOAP API](/integrations/apis/soap.md). This obviates the need for the [Keyfax Client](/product-suite/client.md).\
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Parameter-controlled within the software, QL customers can easily swap from the Client version to the web version. Please contact Aareon for futher details.