Getting cost details through REST API

Question

Hi,

I am trying to get the cost details of subscription using below POST in Python code

https://management.azure.com//subscriptions/1234/providers/Microsoft.CostManagement/generateCostDetailsReport?api-version=2023-03-01

Getting the below error

<Response [400]> {'error': {'code': '400', 'message': 'Invalid request payload, Invalid member :grant_type

I am passing the following data details in the post request. Is this correct? anything i am doing wrong?

"grant_type": "client_credentials",
"client_id":  "1234",
"client_secret": "1234",
"scope": "https://management.azure.com/.default"

Answer 1

I think you are mixing up Azure authentication with the actual API request for cost details. The error indicates that the payload you provided is incorrect for the generateCostDetailsReport endpoint.

Before making the actual API call to get the cost details, you must first acquire an access token using the Azure AD endpoint.

Once you have the access token, you can use it in the Authorization header to call the Azure Management API to get cost details.

Let me break it down for you:

1. Acquire the access token:

Here's how you can get the access token using your client details:

import requests

# Set up your details

tenant_id = '<your-tenant-id>'

client_id = '1234'  # Replace with your client ID

client_secret = '1234'  # Replace with your client secret

# URL to get the token

url = f'https://login.microsoftonline.com/{tenant_id}/oauth2/token'

# Request body

data = {

    'grant_type': 'client_credentials',

    'client_id': client_id,

    'client_secret': client_secret,

    'resource': 'https://management.azure.com/'

}

# Post request to get the access token

response = requests.post(url, data=data)

token = response.json().get('access_token')

2. Use the acquired access token:

Now that you have the token, you can call the generateCostDetailsReport endpoint:

subscription_id = '1234'  # Your subscription ID

api_version = '2023-03-01'

cost_url = f'https://management.azure.com/subscriptions/{subscription_id}/providers/Microsoft.CostManagement/generateCostDetailsReport?api-version={api_version}'

headers = {

    'Authorization': f'Bearer {token}',

    'Content-Type': 'application/json'

}

# Here, you might have to pass some payload specific to the generateCostDetailsReport API

response = requests.post(cost_url, headers=headers)

print(response.json())