msal-bearer
Python package to get authorization token interactively for a msal application.
For public client application using user impersonation it also handles local cache and refreshing the token.
Usage 1: Public client application user impersonation
import requests
import httpx
from msal_bearer import BearerAuth
tenant_id = "YOUR_TENANT_ID"
client_id = "YOUR_CLIENT_ID"
scope = ["YOUR_SCOPE"]
auth = BearerAuth.get_auth(
tenantID=tenant_id,
clientID=client_id,
scopes=scope
)
# Supports requests
response = requests.get("https://www.example.com/", auth=auth)
# and httpx
client = httpx.Client()
response = client.get("https://www.example.com/", auth=auth)
Usage 2: Confidential client with secret
from msal_bearer import Authenticator
tenant_id = "YOUR_TENANT_ID"
client_id = "YOUR_CLIENT_ID"
client_secret = "YOUR_CLIENT_SECRET"
scope = ["YOUR_SCOPE"]
a = Authenticator(
tenant_id=tenant_id
client_id=client_id,
client_secret=client_secret,
)
token = a.get_token(scopes=scope)
Usage 3: Confidential client with user_assertion for OBO authentication on streamlit
from msal_bearer import Authenticator
tenant_id = "YOUR_TENANT_ID"
client_id = "YOUR_CLIENT_ID"
client_secret = "YOUR_CLIENT_SECRET"
scope = ["YOUR_SCOPE"]
user_assertion = st.context.headers["X-Forwarded-Access-Token"]
a = Authenticator(
tenant_id=tenant_id
client_id=client_id,
client_secret=client_secret,
user_assertion=user_assertion,
)
token = a.get_token(scopes=scope)
Installing
Clone and install using uv or install from pypi using pip.
pip install msal_bearer
Alternatives
Other similar packages include https://pypi.org/project/msal-requests-auth/ (for confidential client applications) and https://pypi.org/project/msal-interactive-token-acquirer/ (no caching implemented).
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