> For the complete documentation index, see [llms.txt](https://docs.nexusglobalpayments.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nexusglobalpayments.org/apis/overview.md).

# Overview

The APIs in this section are still under development and may change.

Read (GET) APIs are shown. The additional Create, Update and Delete APIs are also included. Some of these are optional APIs and the specific functionality can also be used via the Nexus Service Desk.

APIs are used for the communication between Nexus and the IPSs and Nexus and the FXPs. PSPs and SAPs connect to Nexus via the IPS. The IPSO is free to reuse the Nexus APIs or adapt these APIs to their domestic implementation. Nexus however expects the IPS to adhere to the Nexus specifications.

Internal APIs that are only used by Nexus services to communicate with each other are not shown.