How to Get an Anthropic API Key
BYOK Live Mode calls Anthropic’s API directly from your browser using your own key. Stellarus never sees the key, the request, or the response. If you don’t have a key yet, here’s how to set one up in about five minutes.
You don’t need a key if you just want to try the tool. Demo Mode on the home page lets you read five curated conversations free, no setup. Get a key only if you want to host your own live conversations between two AI agents.
Step by step
- 1Go to console.anthropic.com. console.anthropic.com →
- 2Sign up (or sign in if you already have an account). You’ll need to add a payment method to access the API. Set a small usage limit in your console settings — this caps how much you can spend.
- 3Click “API Keys” in the sidebar.
- 4Click “Create Key.” Name it something you’ll recognize, e.g.
ai-roundtable-personal. - 5Copy the key immediately. Anthropic only shows it once — you cannot retrieve it later. Keys start with
sk-ant-api03-... - 6Paste it into AI Roundtable’s Live Mode. Open Live Mode →
Security notes
- Your key never reaches Stellarus. AI Roundtable has no backend; the request goes directly from your browser to
api.anthropic.com. - The key lives only in your browser tab while you have it open. We do not store it. Close the tab or refresh and the key is gone — you’ll re-paste it next time.
- Don’t share your key publicly or commit it to a public repository. Anyone with the key can use your account.
- If your key is exposed, revoke it immediately in the Anthropic Console and generate a new one.
Costs
Each conversation incurs API costs charged by Anthropic to your account, not to Stellarus. Costs vary by model (Opus is the most expensive; Haiku the cheapest), conversation length, and persona file size. Set a usage limit in your Anthropic Console so you always know your cap. AI Roundtable does not collect any portion of these charges.