Claude API key
Connect an Anthropic API key to AI Wallet, billed to the account that owns the key, with Anthropic's model list.
The Claude API key account answers with a key from Anthropic. The wallet lists it as Claude under "With an API key", with the id anthropic-key. A Claude subscription is a separate account, described on the Claude plan page.
What the visitor needs
An Anthropic API key. Anthropic bills the account that owns the key.
Connect
- The visitor creates an API key in Anthropic's console, on the account that should pay.
- In the wallet, the visitor picks Claude under "With an API key".
- The visitor pastes the key in the "Claude API key" field and presses Connect.
The wallet keeps the key in its encrypted vault, without the spaces around it. It makes no test call, and a wrong key shows up as the provider's error on the first answer. The key has no expiry in the wallet and stays in the vault until the visitor removes the account.
Models
The wallet lists Anthropic's catalog from https://api.anthropic.com/v1/models, asked with the key, and keeps the list for a day. The visitor picks the account's default model in its settings, and a model per site with the buttons of the side panel. Without a choice, the account answers with claude-haiku-5-5.
Usage and limits
The wallet reads x-ratelimit-remaining-tokens and x-ratelimit-limit-tokens on each answer that carries them. The room left is the remaining tokens divided by the limit. Without these headers, the card keeps saying "Usage shows after the first answer", and Auto ranks the account among the accounts with no reading.
Calls
Answers come from https://api.anthropic.com/v1/messages in Anthropic's Messages protocol, with the key in x-api-key and anthropic-dangerous-direct-browser-access: true. The wallet's header rule for api.anthropic.com applies to these calls as well: it removes Origin and sets Claude Code's User-Agent, claude-cli/2.1.280 (external, Chrome).
The wallet leaves temperature and topP out of these calls, since current Claude models answer them with an error. That protocol requires an output limit on every call, and the wallet asks for 4096 tokens when your site sets no maxTokens. Claude Opus 5.5, Claude Sonnet 5.5 and Claude Fable 5.1 refuse a forced tool choice (required or a named tool), and their error reaches your site with its status.