I’m trying to access the Google Ads API using OAuth 2.0, but I keep getting a 404 Not Found error when querying /customers:listAccessibleCustomers.
I've followed the official Google Ads API OAuth setup guide, and my OAuth token is valid with the correct adwords scope. However, when I try to list the accessible accounts, I receive a 404 Not Found error.
What I Have Done So Far
- Generated an OAuth Access Token via Google OAuth Playground.
- Verified token permissions using:
curl -X GET \
";
Checked Developer Token Status in Google Ads API Center → Status: "Approved". Confirmed Google Ads Account is active with running campaigns. Tried listing accessible accounts with this request:
curl -X POST \
":listAccessibleCustomers" \
-H "Authorization: Bearer MY_ACCESS_TOKEN" \
-H "Content-Type: application/json"
However, I always receive a 404 error