Accessing the Nagios XI API

Nagios XI includes an API that allows developers to pull current status information and more in XML (XI 5, old API) or JSON (XI 2024 & 2026, modern API) format for use by external systems. This simple API makes it easy to integrate Nagios information into third-party applications and external websites and to programmatically manage the XI system and configurations. This document describes how to access to API and query information.

Nagios XI 2024 & 2026 – REST API

How to Access and Use the Nagios XI REST API

Nagios XI v5 (Legacy) – Backend API

Accessing the Nagios XI 5 Legacy Backend API