I am trying to configure the BigFix API to work with the Call Rest API function but I get stuck with the authentication parameter.
Below is the format required by the Bigfix.  Since the authentication is not using the header method, How do we define the authentication in the function script? 

This is what BigFix is expecting.  I tested using Python interpreter and works but I don't know how to translate this to the Rest API function script.
'https://bigfix.server.com:50000/api/computer/', auth=('username', 'password'), verify=False

Function script:
inputs.rest_api_method = 'GET'
inputs.rest_api_url = 'https://bigfix.server.com:50000/api/computer/'
inputs.rest_api_verify = False

Hi Ray.

Not sure though, it may be the case.

According to the site, The login from the REST API Client to the BigFix REST API server uses basic access authentication.

Though I did not try with BigFix, I guess you can try the following Basic authentication snipet.

api_key and api_secret can be substituted with user and password.

# Basic Authentication
# 
# curl -u ${api_key}:{api_secret} <url>
# 
api_key="...."
api_secret="..."

# consutruct auth header
import base64
base64_api=base64.b64encode((api_key + ":" + api_secret).encode()).decode()
auth_header = "Basic " + base64_api

# construct request header
header = """
Authorization: {0}
Content-Type: application/json
"""
header = header.format(auth_header)

inputs.rest_api_headers = header if header else None

Thanks for the suggestions but I don't have much luck to get it to work.
The BigFix API authentication is very strange.  It is different from the one I work with before.

Below is the vendor URL with authentication example in Python.  It didn't mention anything about the base64.

https://developer.bigfix.com/rest-api/examples/get-computer.html

import requests 
r = requests.get('https://{server}:{port}/api/computer/{id}', auth=('{username}', '{password}'))
print(r.text)

Hi Ray

According to https://developer.bigfix.com/rest-api/examples/get-computer.html, it describes:

cURL

curl -X GET --user {username}:{password} https://{server}:{port}/api/computer/{id}

The above implies Basic Authentication is used because the curl default authentication is basic authentication.

 So I think you can try with basic authentication  code in your playbook.

Thanks for all the help!   I finally able to get this to work using the basic auth method.  Below is what I have

import json
headers = {
    'Content-Type': 'application/json',
    "Authorization": f"Basic my_base64_secret"
}
inputs.rest_api_method = 'GET'
inputs.rest_api_headers = json.dumps(headers)
inputs.rest_api_url = 'https://mybigfixserver.domain.com:12345/api/computer'
inputs.rest_api_verify = False