How to include bearer token authentication in Python HTTP requests

Other Questions API
1

I need help with calling a REST API from my Python script that requires bearer token authentication.

I have successfully obtained the bearer token from the API provider, but I’m struggling with the correct way to include it in my Python HTTP requests. The API works fine when I test it with cURL and include the token in the Authorization header.

I’ve attempted using both urllib and requests libraries but keep getting authentication errors. Could someone show me the proper syntax for adding bearer token authentication to API calls in Python?

Any working code examples would be really helpful since I’m new to working with authenticated APIs.

2

Had this exact issue when I first started working with authenticated APIs. The key is making sure you format the Authorization header correctly with the requests library. Here’s what worked for me:

import requests

token = "your_bearer_token_here"
headers = {
    "Authorization": f"Bearer {token}",
    "Content-Type": "application/json"
}

response = requests.get("https://api.example.com/endpoint", headers=headers)

One thing that tripped me up initially was forgetting the space between “Bearer” and the actual token. Also worth checking if your token has expired since some APIs have short token lifespans. If you’re still getting auth errors, try printing the headers to verify the token is being passed correctly.

3

Something that caught me off guard when I switched from urllib to requests was handling the token refresh properly. While the previous answer covers the basic syntax well, I found that many APIs will reject tokens if you don’t handle the request session correctly. What solved my authentication issues was creating a persistent session object and setting the headers once rather than passing them with each individual request. The session approach also handles cookies and connection pooling better. Make sure you’re also checking the response status code specifically for 401 errors, which usually indicate token problems rather than general request issues. Sometimes the API documentation isn’t clear about additional headers they expect alongside the bearer token.

4

urllib can be tricky with bearer tokens tbh. if you really want to stick with urllib instead of requests, you gotta use urllib.request.Request and add_header method. something like req = urllib.request.Request(url) then req.add_header('Authorization', 'Bearer ' + your_token). but honestly just switch to requests library, its way easier and less headache.