How to get a Master Token

Google Keep API requires a master token (not app passwords):

1. Open accounts.google.com/EmbeddedSetup in a new tab
2. Log into your Google account
3. Click "I agree" (page may show loading forever - that's OK)
4. Press F12 to open DevTools → Application tab → Cookies
5. Copy the value of the oauth_token cookie
6. Run this command (you need Docker):

   docker run --rm -it python:3 -c "import subprocess; subprocess.run(['pip', 'install', '-q', 'gpsoauth']); exec(open('/dev/stdin').read())" <<< "import gpsoauth; print(gpsoauth.exchange_token('YOUR_EMAIL', 'OAUTH_TOKEN_HERE', 'ANDROID_ID'))"

7. For Android ID, use any 16-character hex string (e.g., 1234567890abcdef)
8. The output will contain your master token