Dynamics 365 Web API giving 401 error?

Question

I was trying out Microsoft Dynamics 365 (v9.0) Web APis. I was able to generate access token but yet my api call is failing. I am using adal for python

from adal import AuthenticationContext
import requests

api = 'https://xxxxxx.crm8.dynamics.com/api/data/v9.0/'

auth_context = AuthenticationContext('https://login.microsoftonline.com/xxxxxx.com')


token = auth_context.acquire_token_with_client_credentials(
    resource='https://xxxxxx.com/0d74ff2f-d7d2-46f4-a3c3-fb4f6d49aa51',
    client_id='6e859f06-0d88-413f-a3fe-1ae12cc7350d',
    client_secret='abigclientsecret')

print(token)

at = 'Bearer ' + token['accessToken']

headers = {'Authorization' : at,
"Content-Type" : "application/json; charset=utf-8",
'OData-MaxVersion' :'4.0',
'OData-Version' :'4.0',
'Accept' : 'application/json'}
response = requests.get("https://xxxxxx.api.crm8.dynamics.com/api/data/v9.0/contacts", headers=headers)
print(response)

Arun Vinoth Arun Vinoth · Accepted Answer · 2018-08-22T19:15:28

You have to use Organization URI like below: (removed .api. from your snippet)

response = requests.get("https://xxxxxx.crm8.dynamics.com/api/data/v9.0/contacts", headers=headers)

I see you have initialized a variable called api = 'https://xxxxxx.crm8.dynamics.com/api/data/v9.0/' which is correct but you have not used it.

Dynamics 365 Web API giving 401 error?

2 Answers