The API Call object defines the HTTP request we make from a deployment. The request can have an Authentication Setting and Authentication Token applied to it.
Example object:

{
  "meta": {
    "domain": "httpbin.org", 
    "description": null, 
    "created": "2015-09-18T23:29:39.534120Z", 
    "tags": [], 
    "accept": null, 
    "last_update": "2015-09-18T23:29:39.534173Z", 
    "content_type": null, 
    "owner": "agxkZXZ-dmlhdGVzdHNyEQsSBFVzZXIYgICAgICAgAoM", 
    "name": "Minimal API test name"
  }, 
  "request": {
    "body": null, 
    "parameters": [], 
    "url": "http://httpbin.org/get", 
    "auth_id": null, 
    "headers": [], 
    "token_id": null, 
    "method": "GET"
  }, 
}

Name	Description	Required?
meta	See below	Y
access	See below	N
request	See below	Y

Section: meta

Name	Description	Required?
name	Name of the call for your reference	Yes
description	Description of the call for your reference	No
tags	List of Tags for the call for your reference	No
owner	The ID of the Owner of the call	No - read-only

Section: request

Name	Description	Required?
method	HTTP method to use	Y
url	URL to call	Y
parameters	List of request parameters to append to the call	N
headers	List of headers to include in the call	N
body	Content of a POST or PUT call	N
auth_id	The ID of the authentication settings to use	N
token_id	The ID of the token to use with the authentication settings	N