> 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/apis/legacy-apis.md).

# Legacy APIs

- [Active X](https://docs.keyfax.biz/integrations/apis/legacy-apis/active-x.md)
- [Asynchronous Pluggable Protocols](https://docs.keyfax.biz/integrations/apis/legacy-apis/asynchronous-pluggable-protocols.md)
- [XmlHttp](https://docs.keyfax.biz/integrations/apis/legacy-apis/xmlhttp.md)