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claude-api-in-prototypes

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Call Claude from your HTML artifacts via window.claude.complete

Anthropic/claude-design/skills/claude-api-in-prototypes/SKILL.md

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Local scripts
Last checked
Nov 10, 2026

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# Claude API in prototypes

Your HTML artifacts can call Claude via a built-in helper. No SDK or API key needed.

```html
<script>
(async () => {
  const text = await window.claude.complete("Summarize this: ...");
  // or with a messages array:
  const text2 = await window.claude.complete({
    messages: [{ role: 'user', content: '...' }],
  });
})();
</script>
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