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AI settings & your API key

Connect your own Anthropic API key, and choose the model, language and tone.

1 min read · Updated October 8, 2026

The AI features of Core SEO Premium run on your own Anthropic API key: no subscription and no markup — you pay Anthropic only for what you use, usually a few cents per page.

Add your key#

  1. Create a key in the Anthropic Console: console.anthropic.com → API keys.
  2. Paste it under Core SEO → AI settings and save. The key stays on your site.

Settings#

Setting What it does
Model Claude Opus 5.5 — best writing (default); Claude Sonnet 5.5 — fast, about half the cost; Claude Haiku 4.5 — fastest and cheapest.
Workspace ID Only for organisation-wide keys.
Language Empty = the language of each page.
Tone of voice Optional, for example “friendly and plain, we say you”.

Privacy#

Only when someone uses an AI feature, the page title, focus keyphrase and the start of the text are sent from your site to the Anthropic API. Nothing is sent to Xolius. Anthropic’s terms and privacy policy apply to that data.

If the AI does not answer#

Message What to do
The API key was not accepted Check the key in the Anthropic Console, or create a new one.
Too many requests or no credit left Wait a moment, or add credit in the Anthropic Console.
The AI service is busy Try again in a minute.
The secure connection cannot be verified Usually an antivirus that inspects HTTPS on your own computer (for example a “Web Shield”): add an exception for api.anthropic.com.