Authentication

Note

The Auth module cannot automate login using a username and password because Yahoo Finance requires solving a reCAPTCHA, which blocks automation. You must manually obtain and set the authentication cookies.

Class

The Auth module lets you log in to Yahoo! Finance, check the login state and read the account’s subscription tier.

Auth([session])

Auth Sample Code

Logging in with browser cookies, then checking the login state and subscription tier:

import yfinance as yf
import os

auth = yf.Auth()

# Set login cookies obtained from your browser. The call stores them, validates
# them with a live login check, and returns whether the account is logged in.
if auth.set_login_cookies(os.getenv("COOKIE_T"), os.getenv("COOKIE_Y")):
    print("Logged in")
else:
    print("Invalid or expired cookies")

# Every subsequent request sent to Yahoo Finance is now under the logged-in user.

# Re-check the live login state at any time (re-queried each call, never cached).
auth.check_login()        # -> True / False

# Yahoo Finance subscription tier of the logged-in account.
auth.subscription_tier()  # -> 'gold' / 'silver' / 'bronze' / 'free' / None

# Access user information.
auth.user                 # -> {'guid': ...} or None

Obtaining Yahoo Finance Cookies

To authenticate with Yahoo Finance, you need to obtain specific cookies. Follow these steps:

Steps to Obtain the Cookies

1. Open your browser (e.g., Chrome, Firefox).

2. Log in to Yahoo Finance.

3. Open the browser’s Developer Tools:

   • Press F12 or Ctrl + Shift + I (Windows/Linux)

   • Press Cmd + Option + I (Mac)

4. Navigate to the Application tab (Chrome) or Storage tab (Firefox).

5. In the Cookies section, select https://finance.yahoo.com.

6. Locate the cookies named T and Y.

7. Copy the values of these cookies and pass them to the authentication function.