python requests post certificate verify failed

Python Requests Post Certificate Verify Failed

If you are encountering a certificate verification error when using the Requests library to make a POST request in Python, there are several possible causes for this issue. This error message usually indicates that the SSL certificate presented by the server could not be verified by your Python installation.

Possible Causes:

  • The remote server's SSL certificate is not valid or expired.
  • Your Python installation does not recognize the Certificate Authority (CA) that issued the remote server's SSL certificate.
  • Your Python installation is missing a required CA bundle file.


There are several solutions to resolve this issue:

Disable SSL Verification:

import requests'', verify=False)

This solution is not recommended because it leaves your application vulnerable to man-in-the-middle attacks.

Update your CA Bundle File:

import requests'', verify='/path/to/ca_bundle_file')

You can download the latest CA bundle file from the cURL website or the Mozilla website.

Install Certifi:

import requests
import certifi'', verify=certifi.where())

Certifi is a Python package that provides a default CA bundle file that can be used for certificate verification in Requests. You can install it using pip.

Create a Custom Certificate Verification Function:

import requests
import ssl

def verify_cert(cert, hostname):
    # Add custom verification logic here
    return True'', verify=verify_cert)

You can create a custom certificate verification function that implements your own SSL certificate validation logic. This function should take two parameters: the SSL certificate presented by the remote server and the hostname that you are connecting to.