How to get an Anthropic API key
Anthropic makes Claude, the model TalkingSheet uses by default. Bringing your own Anthropic key means your usage is billed directly to your own Anthropic account instead of counting against TalkingSheet's shared monthly credits.
Steps
Go to the Anthropic Console
Open console.anthropic.com and sign in (or create an account — no credit card required just to sign up).
Open API Keys
In the left sidebar, click API Keys.
Create a key
Click Create Key, give it a name like "TalkingSheet", and click Add.
Copy it immediately
Your key (it starts with sk-ant-) is shown once. Copy it somewhere safe — you won't be able to view it again after you close this dialog, only revoke it and make a new one.
Add billing
If this is a new account, go to Billing and add a payment method or prepaid credits — a key with no balance behind it will fail on its first real request.
Now add it to TalkingSheet
Open the add-on sidebar → Settings → turn on Use my own API key → pick Anthropic → paste your key → Save. Your key stays in your own Google account's storage — it never touches TalkingSheet's servers. See how BYOK works for details.