# Tempest Retone — AI Tone Adjustment Endpoint

> Tempest Retone — AI Tone Adjustment Endpoint is a paid API for AI agents from tempost.vercel.app, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-15).

Rewrites a piece of text to match a specified target tone (e.g. formal, casual, empathetic, confident) while preserving core meaning.

## Facts

- Endpoint: POST https://tempost.vercel.app/api/retone
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tempest-retone-ai-tone-adjustment-endpoint-1e58a8a4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KCL75VwsZpoEeKtNfutDR

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability tempest-retone-ai-tone-adjustment-endpoint-1e58a8a4 -d '<json body>'
```

Example prompt: Take this draft email — 'We noticed an issue with your account and need you to fix it ASAP' — and rewrite it in a calm, professional tone.

## When to prefer this

Choose this endpoint when you need to adjust the emotional register or formality level of existing text without changing its core content. Ideal for polishing drafts, adapting communications for different audiences, or standardizing tone across large volumes of text. Prefer this over a full rewrite endpoint when structure should be preserved but voice needs adjustment.

## Known failure modes

- Missing required `text` or `target_tone` fields returns a validation error
- Ambiguous or unsupported tone values may produce unexpected output
- Very long texts may time out or be truncated
- Payment failure (insufficient USDC) will block the request
- Network or Vercel deployment downtime may cause 503 errors

## 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, rewritten to match the specified target tone while preserving the original meaning.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text",
  "target_tone"
 ],
 "properties": {
  "text": {
   "type": "string",
   "description": "Text to retone"
  },
  "target_tone": {
   "type": "string",
   "description": "Desired tone"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tempest-retone-ai-tone-adjustment-endpoint-1e58a8a4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tempost.vercel.app](https://www.zero.xyz/host/tempost.vercel.app/llms.txt)