Get your API key

Krillionhack is free, but it needs your own Anthropic API key to get answers from Claude. You pay Anthropic directly for what you use, and you can cap how much that is. Setup takes about 10 minutes.

What it costs

One question	About $0.03
A 7-question game	About $0.21
What $5 of credit covers	About 160 questions, or 23 games

These are estimates, and the real cost varies by question. The extension shows what you've spent each day, and you can check exact costs in the Claude Console.

1. Create an Anthropic account

Go to platform.claude.com and sign up. This is separate from a Claude.ai subscription. You must be 18 or older. Anthropic asks about your organization and how you'll use the API, so answer truthfully. An individual is fine.

2. Add credits

On the Billing page, click Buy credits. $5 is plenty to start. Credits can't be refunded and expire after one year. Leave auto-reload off, so you can't spend more than you've added.

Have Claude Max, Ultra or Team? Your plan includes monthly API credits, with no card needed. Sign in to the Console with the same login as your plan. Then on claude.ai, go to Settings > Billing > API credits and link your Console organization. Each plan links to one organization, so choose carefully.

3. Create a workspace with a spend limit

A workspace is like a folder for your key, with its own spending cap, so the key can't spend more than you choose.

Open the Create workspace page. This link takes you straight there, so you don't need to look for a button. If it asks you to sign in first, do that, then click the link again.
Type Krillionhack as the name, and pick any color. The color only helps you recognize it.
Click Create workspace to finish.
Open the Workspaces page and click Krillionhack in the list. A panel opens. Don't use Default, because it can't have a spend limit.
In the panel, click Spend limits.
Under Monthly limit, click Change limit. Enter an amount you're comfortable with, such as $5, and save it.

Can't create a workspace? Only an organization's admins can. If you signed up yourself, you should be one. If someone invited you to their organization, ask them to do this step, or switch to your own organization.

4. Create your key

Open the API keys page and click Create key.
Name it Krillionhack, and pick an expiration. A shorter one is safer, and you can always make a new key.
Set Linked account to yourself.
Choose your Krillionhack workspace. A key without a workspace won't work with the extension.
Copy the key. It starts with sk-ant-, and it's only shown once.

5. Add it to the extension

Download and install Krillionhack if you haven't yet.
In Chrome, click the Krillionhack icon in your toolbar. The side panel opens.
Paste your key and click Save key. The extension checks the key with Anthropic, which costs nothing.

You're done. On a Krillion question, press Alt+Shift+K (Option+Shift+K on a Mac) or click the icon. Clicking can move your cursor out of the answer box, so try the shortcut first. If the shortcut does nothing, you can set your own at chrome://extensions/shortcuts.

Keep your key safe

Treat it like a password. Anyone who has it can spend your credits. Never post it or send it to anyone, including us. We'll never ask for it.
Only download Krillionhack from this site. A copy passed around by someone else could be changed to steal your key.
Where it's kept: in Chrome on this computer, and it's only ever sent to Anthropic. It never reaches our servers. Anyone with access to your computer account could potentially read it, so remove it from shared computers.
If you think it leaked, delete it on the API keys page, which stops it right away, and create a new one.
To stop using it, open Settings in the side panel and click Remove key, then delete it on the API keys page too.

If something goes wrong

The extension says	What to do
Anthropic didn't accept this key	It may be mistyped, expired or deleted. Create a new key.
This key needs to belong to a workspace	Create a new key and choose your workspace.
Your API account is out of credits	Buy more on the Billing page.
Reached the spend limit you set	Raise it on the Workspaces page, or wait until next month.
Reached its monthly cap	This is Anthropic's limit for your account tier. Wait until next month, or request a higher tier in the Console.
Too many requests	New accounts have lower limits. Wait a minute and try again.

Good to know

What gets sent: each time you press the button on a Krillion game page, the extension sends a screenshot of that page straight from your browser to Anthropic. We never receive it. Anthropic normally keeps API inputs and outputs for up to 30 days, and longer if flagged for a policy review.
Answers come from AI and can be wrong.
Your API account is yours. Anthropic's Usage Policy applies to it, including its rule against getting around the terms of other platforms. You're responsible for following that policy and the rules of any game you use this with.

Questions? Email hpwenoch@gmail.com. See also our Terms and Privacy policy.