> For the complete documentation index, see [llms.txt](https://docs.payrexx.com/merchant/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payrexx.com/merchant/english/integration/more-integrations.md).

# Other Integrations

This article explains how to connect Payrexx to any third-party system, even if it isn't directly supported through a plugin integration.

If your company uses proprietary systems that aren't directly supported by Payrexx (for example, a custom CRM or accounting solution), you can connect them to Payrexx yourself using our [API](/merchant/english/account/api-and-plugins.md) and [webhooks](/merchant/english/account/webhooks.md):

* CRM software
* Accounting software
* Invoicing systems
* Databases of public institutions

For further information, please visit our [developer documentation](https://docs.payrexx.com/developer).


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