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Thank you for your interest in Ansible Tower. Ansible Tower is a commercial offering that helps teams manage complex multi-tier deployments by adding control, knowledge, and delegation to Ansible-powered environments.
The Ansible Tower API Guide focuses on helping you understand the Ansible Tower API. This document has been updated to include information for the latest release of Ansible Tower v3.8.0.
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This document offers a basic understanding of the REST API used by Ansible Tower.
REST stands for Representational State Transfer and is sometimes spelled as “ReST”. It relies on a stateless, client-server, and cacheable communications protocol, usually the HTTP protocol.
You may find it helpful to see which API calls Tower makes in sequence. To do this, you can use the UI from Firebug or Chrome with developer plugins.
Another alternative is Charles Proxy (http://www.charlesproxy.com/), which offers a visualizer that you may find helpful. While it is commercial software, it can insert itself as an OS X proxy, for example, and intercept both requests from web browsers as well as curl and other API consumers.
REST APIs provide access to resources (data entities) via URI paths. You can visit the Ansible Tower REST API in a web browser at: http://<Tower server name>/api/
Ansible Tower 3.2 introduced version 2 of the API, which can be accessed by clicking the v2 link next to “available versions”:
Alternatively, you can still access version 1 of the API this way, but it will be removed in a future release of Ansible Tower.
If you perform a GET just the /api/ endpoint, it gives the current_version, which would be the recommended version.
Clicking on various links in the API allows you to explore related resources.
Clicking on the 
next to the page name (toward the top of the screen) for an API endpoint gives you documentation on the access methods for that particular API endpoint and what data is returned when using those methods.
You can also use PUT and POST verbs on the specific API pages by formatting JSON in the various text fields.
You can also view changed settings from factory defaults at /api/v2/settings/changed/ endpoint. It reflects changes you made in the API browser, not changed settings that come from static settings files.
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