Failed to get master token

[ChronoWerX82]

Describe the bug

Can't setup, every times this message is coming up:

Nutzername/Passwort ist nicht korrekt. Falls dein Google Account die Zwei-Faktor-Autentifizierung aktiviert hat, generiere bitte ein App Passwort (https://myaccount.google.com/apppasswords). Sollte die Authentifizierung weiterhin fehlschlagen, findest du weitere Informationen unter https://github.com/leikoilja/ha-google-home#troubleshooting

Version of the integration

If you are unsure about the version check the github release here.

v1.13.1

Logs

Failed to get master token
Traceback (most recent call last):
  File "/config/custom_components/google_home/config_flow.py", line 138, in _get_master_token
    master_token = await client.async_get_master_token()
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/config/custom_components/google_home/api.py", line 82, in async_get_master_token
    raise InvalidMasterToken
custom_components.google_home.exceptions.InvalidMasterToken

[DaHype]

Any solution? Same problem :-(

[BristolBEAT]

Again, any solution same problem.

This error originated from a custom integration.

Logger: custom_components.google_home
Source: custom_components/google_home/config_flow.py:138
integration: Google Home (documentation, issues)
First occurred: 15:13:26 (2 occurrences)
Last logged: 15:13:36

Failed to get master token
Traceback (most recent call last):
File "/config/custom_components/google_home/config_flow.py", line 138, in _get_master_token
master_token = await client.async_get_master_token()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/config/custom_components/google_home/api.py", line 82, in async_get_master_token
raise InvalidMasterToken
custom_components.google_home.exceptions.InvalidMasterToken

[wpwentzell]

Same exact issue here (using DietPi)

Jan 18 20:54:26 DietPi Home Assistant[3719143]: 2026-01-18 20:54:26.083 ERROR (SyncWorker_2) [glocaltokens.client] [!] Could not get master token.
Jan 18 20:54:26 DietPi Home Assistant[3719143]: 2026-01-18 20:54:26.083 ERROR (MainThread) [custom_components.google_home] Failed to get master token
Jan 18 20:54:26 DietPi Home Assistant[3719143]: Traceback (most recent call last):
Jan 18 20:54:26 DietPi Home Assistant[3719143]: File "/mnt/dietpi_userdata/homeassistant/custom_components/google_home/config_flow.py", line 138, in _get_master_token
Jan 18 20:54:26 DietPi Home Assistant[3719143]: master_token = await client.async_get_master_token()
Jan 18 20:54:26 DietPi Home Assistant[3719143]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jan 18 20:54:26 DietPi Home Assistant[3719143]: File "/mnt/dietpi_userdata/homeassistant/custom_components/google_home/api.py", line 82, in async_get_master_token
Jan 18 20:54:26 DietPi Home Assistant[3719143]: raise InvalidMasterToken
Jan 18 20:54:26 DietPi Home Assistant[3719143]: custom_components.google_home.exceptions.InvalidMasterToken

[julianpitt]

I wasn't able to get any of the methods working except the alternative method for gpsauth. I wrote a gist detailing the process

[GRA0007]

I was finally able to get a master token using the method you documented @julianpitt, but entering it into the ha-google-home setup with my email and app password always fails with Could not get access token.

Full log entry

This error originated from a custom integration.

Logger: custom_components.google_home
Source: custom_components/google_home/config_flow.py:146
integration: Google Home (documentation, issues)
First occurred: January 26, 2026 at 11:59:19 PM (8 occurrences)
Last logged: 12:13:39 AM

Failed to get access token
Traceback (most recent call last):
  File "/config/custom_components/google_home/config_flow.py", line 146, in _get_access_token
    access_token = await client.async_get_access_token()
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/config/custom_components/google_home/api.py", line 93, in async_get_access_token
    raise InvalidMasterToken
custom_components.google_home.exceptions.InvalidMasterToken

[BristolBEAT]

ChatGPT helped me through this and I have it working.

Try this in your: nano get_master_token.py

import gpsoauth
import json

EMAIL = 'yourgmail'       # your Google email
ANDROID_ID = '0123456789abcdef'       # leave as-is
OAUTH_TOKEN = 'oauth2_4/XXXXXXXXX' # your token found in Inspect -> Applications -> Storage → Cookies → https://accounts.google.com

# use exchange_token instead of get_master_token
master_response = gpsoauth.exchange_token(EMAIL, OAUTH_TOKEN, ANDROID_ID)

print("Full response for debugging:")
print(json.dumps(master_response, indent=2))

master_token = master_response['Token']
print(f"\nMaster token: {master_token}")

[KapJI]

If anyone wants to add oauth token approach to config flow, PR is welcome.

[archon810]

your token found in Inspect -> Applications -> Storage → Cookies → https://accounts.google.com/

I can't find any cookies with oauth2 in it on this page?

Edit: #987 (comment) this solution seems to work.

[TekuSP]

Recommendation to get the oauth2, login here https://accounts.google.com/EmbeddedSetup and then do with cookies with inspect. It will be there.

[BristolBEAT]

Sorry I missed giving you the correct link as @TekuSP has done.

This link will never login (spins continuously) but whilst it appears to be you should be able to find the oauth2 in Inspect -> Applications -> Storage → Cookies

[joanscure]

ChatGPT helped me through this and I have it working.

Try this in your: nano get_master_token.py

import gpsoauth
import json

EMAIL = 'yourgmail'       # your Google email
ANDROID_ID = '0123456789abcdef'       # leave as-is
OAUTH_TOKEN = 'oauth2_4/XXXXXXXXX' # your token found in Inspect -> Applications -> Storage → Cookies → https://accounts.google.com

# use exchange_token instead of get_master_token
master_response = gpsoauth.exchange_token(EMAIL, OAUTH_TOKEN, ANDROID_ID)

print("Full response for debugging:")
print(json.dumps(master_response, indent=2))

master_token = master_response['Token']
print(f"\nMaster token: {master_token}")

Confirming that this method still works! I managed to get it running on Home Assistant (Docker version) by running the script inside the container. The gpsoauth.exchange_token method correctly generated the aas_et/ master token. Thanks for sharing!

[archon810]

What if https://accounts.google.com/EmbeddedSetup goes away? Does anyone know of another way of getting an oauth token? I wasn't able to extract it on this page https://accounts.google.com.

[kostecky]

I've put together a working script based on the previous comment above that guides you along. I'm hoping this works for everyone. I was suffering from the None master token that the README/instructions did not cover:

https://gist.github.com/kostecky/a89967b031e59caf4a70973dc94fa0aa

[jarooij]

Save yourself the trouble. Once you have a master token and enter it, it works for a while. If you have to restart Home Assistant for any reason, the master token will no longer work, and you'll have to start the whole process over. I'm getting really tired of Google. Google, please do something about this!