How to use
Enter a role/content array and model. OpenAI produces model + input; Anthropic separates system content.
Example
Two role/content records become a provider request body.
AI API MESSAGE BUILDER
AI API Message Builder
Build OpenAI Responses or Anthropic Messages bodies from role messages.
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Read only
Ready. Enter your content, then choose an action.
◇ Content is processed in this browser onlyInput is not saved automatically
Keep in mind
Builds JSON only; no request is sent and no key is accepted. Check current official API docs. Up to 100 text messages.
Common questions
Why no Authorization header? Add secrets only in a secure server environment.