[module] Services [and REST Server]

From Services Installation and Setup:

Installation is typical of any Drupal module. Services 3.x does have several dependencies you will need.

Drupal 7 dependencies:

- CTools

- Libraries (if using Rest Server)

Drupal 6 dependencies:

- CTools

- Inputstream (if using REST Server)

- Autoload (if using REST Server).

After getting these dependencies in place you can install as you normally would.

The main Services administration area is at admin/structure/services. Click on the "Add" link on that page to create a new service definition. You can also use the "Import" link to import a service definition that has been exported from another Drupal website running services. (The Services modules uses a CTools export_ui plugin to support adding, importing and exporting service definitions.)

Services are defined as 'endpoints'. An endpoint is a unique URL stem that acts as a base for all calls. Each endpoint is defined by a combination of URL, server, and authentication. So for instance you could define two REST services, one authenticated and one available for anonymous users, with unique URLS like

http://example.com/api/anonymous/
http://example.com/api/authenticated

In addition to defining a unique URL, the service definition specifies what type of server is used to return data requests (e.g., REST, XMLRPC, etc.):