Anthropic API key

What you need

You need a Cella Max plan, an internet connection, and a Claude Console account with API access. Claude chat subscriptions and Claude Console API usage are separate products. Your Console organization may need prepaid usage credits before Cella can complete a test request.

Good to know: An API key is a secret that can spend money on your provider account. Create a key for your own use, do not share it, and delete or disable it immediately if you think it has been exposed.

Create the key in Claude Console

1. Open Claude Console API keys and sign in. Create a Console account if you only have a Claude chat account.
2. If asked, select the organization and workspace you want Cella to use.
3. Open Settings > API keys and select Create key.
4. Give the key a clear name, such as Cella iPhone.
5. For a personal setup, link the key to yourself. If workspace selection is available, choose the workspace whose usage and costs you want to track.
6. Choose an expiration. Remember that an expired key must be replaced in Cella.
7. Create the key and copy the secret when it appears.

If your organization has no usable balance, open Settings > Billing in Claude Console and buy usage credits. Billing controls may require an Admin or Billing role.

Add the key to Cella

1. In Cella, open More > Settings > AI Engine.
2. Under Cloud Providers, tap Add Cloud Provider.
3. Set Provider to Anthropic.
4. Leave Display name as Anthropic, or enter a name that helps you recognize this account.
5. Paste the secret into API key. Do not add spaces before or after it.
6. Tap Choose model and select one of the compatible models returned for your key.
7. Tap Test connection.
8. When Cella shows Authenticated, structured output and chat tools verified, tap Save.

Cella stores the key in the iOS Keychain. When you select this provider for a vault, relevant document content is sent directly from your iPhone to Anthropic under your Anthropic account and terms.

If the connection fails

• API key was rejected: Copy the key again, check that it has not expired or been disabled, and remove accidental spaces.
• No models appear: Confirm that the key is linked to a workspace where you have API access. You can also tap Enter model ID manually if Anthropic model discovery is temporarily unavailable.
• Rate limited or billing error: Check the balance and limits for the selected Claude Console workspace.
• An old key stopped working: Create a replacement, open the provider row in Cella, paste the new key, test again, and save.

For current provider instructions, see Anthropic authentication and Claude API billing.