Python Requests Library: Making Authenticated POST Requests

Feb 3, 2024 ยท 2 min read

The Python Requests library provides a simple way to make HTTP requests in Python. This includes POST requests, which allow you to submit data to APIs and web services.

In some cases, these services require authentication in order to access them or submit data. The Requests library has built-in support for Basic HTTP Authentication, making it easy to authenticate your POST requests.

Here is an example of making a POST request with Basic Authentication in Python using the Requests library:

import requests

url = ''
username = 'myusername'
password = 'mypassword' 

headers = {'Content-Type': 'application/json'}
data = {'key1': 'value1', 'key2': 'value2'}

response =, auth=(username, password), headers=headers, json=data)

Let's break this down:

  • We import the requests library to make the HTTP requests
  • We define the API URL, username, password, headers, and data dict that will be POSTed
  • To enable Basic Auth, we pass a tuple of (username, password) to the auth parameter
  • We pass our headers and data to the .post() method
  • This returns a Response object with the API response
  • The key thing that enables the authentication is simply passing that auth tuple. Requests handles adding the proper Authorization header.

    Some tips when making authenticated requests:

  • Use HTTPS to secure credentials
  • Consider OAuth for token-based authentication
  • Handle errors properly - authenticate issues return 401 status codes
  • Making authenticated API requests is very common. This Requests example provides a simple and Pythonic way to POST data with the required credentials. The Requests library handles much of the complexity behind the scenes!

    Browse by tags:

    Browse by language:

    The easiest way to do Web Scraping

    Get HTML from any page with a simple API call. We handle proxy rotation, browser identities, automatic retries, CAPTCHAs, JavaScript rendering, etc automatically for you

    Try ProxiesAPI for free

    curl ""

    <!doctype html>
        <title>Example Domain</title>
        <meta charset="utf-8" />
        <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1" />


    Don't leave just yet!

    Enter your email below to claim your free API key: