When trying to sync base wallet, it says invalid api key. (Many wallets that I have, not just one).
Wallet: metamask
I use auto sync, it has worked before.
I’m seeing the same symptom on my Base Metamask wallet. Says invalid API key even though I’m not using an API to sync the wallet, just the public address. I’m guessing there is a problem between Koinly and whatever block explorer they are using.
Cuzdan gecerli diye gorunmezmi
Hey @Jonne_Makkonen
Thanks for reaching out! 
I found a couple of user’s affected by the error (one looks to be yours). I have synced the wallet and the error has disappeared, so it must have just been a temporary issue. 