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Tempest AI Content Engine — Retone
x402
Tempest AI Content Engine — Retone is a paid API for AI agents from tempestars.vercel.app, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-14).
Rewrites a piece of text in a specified target tone (e.g. professional, casual, empathetic) while preserving meaning
Price / call$0.2
Success—
StatusUnknown
How this service works
Compose, rewrite, translate, and refine content at scale. 25 AI-powered endpoints. Pay-per-call with USDC on Tempo.
Output
Returns a JSON object with a success boolean and a data object containing the retoned version of the input text adjusted to match the specified target tone.
Example use cases
Professional email tone conversion
“I wrote a casual message to a client but it sounds too informal — can you rewrite it in a professional tone? The text is: 'Hey Sarah! Super excited to finally get moving on this. Let me know when you're free to chat!'”
Empathetic customer support reply
“Rewrite this support response to sound more empathetic and warm: 'Your refund has been processed. It will appear in 5-7 business days.'”
Friendly brand voice for marketing copy
“I have this product description that sounds too stiff — can you retone it to be casual and enthusiastic? Here it is: 'Our software solution facilitates the optimization of operational workflows across enterprise environments.'”
Technical details
Endpoint
POSThttps://tempestars.vercel.app/api/retoneWhen to prefer
Choose this endpoint when you need to adjust the emotional register or voice of existing text without changing its core meaning — ideal for adapting content across audiences (formal vs casual), brand voice alignment, or diplomatic rephrasing. Prefer this over a general rewrite endpoint when tone is the primary variable to control.
Side effects
- Missing required field 'text' — returns error indicating required parameter absent
- Missing required field 'target_tone' — returns error indicating required parameter absent
- Ambiguous or unrecognized tone value may produce unexpected or generic output
- Empty or very short input text may yield poor quality retoning
- Payment failure (insufficient USDC) results in 402 Payment Required before processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | Text to retone |
| target_tonerequired | string | Desired tone |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| data | object | |
| success | boolean |
Tags
x402
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