# Tempest Retone — AI Tone Adjustment Endpoint

> Tempest Retone — AI Tone Adjustment Endpoint is a paid API for AI agents from trempest.vercel.app, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-14).

Rewrites a given piece of text to match a specified target tone (e.g. professional, casual, empathetic, confident)

## Facts

- Endpoint: POST https://trempest.vercel.app/api/retone
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tempest-retone-ai-tone-adjustment-endpoint-ffb6f672
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ny8JLe3XlkFVlbI15YzkT

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-ffb6f672 -d '<json body>'
```

Example prompt: Can you rewrite this paragraph in a warm, empathetic tone? Here's the text: 'We are unable to process your request at this time due to insufficient account balance. Please add funds and try again.'

## When to prefer this

Choose this endpoint when you need to transform the emotional register or stylistic tone of existing text without changing its core meaning — ideal for adjusting emails, marketing copy, customer support replies, or any written content to better fit an audience or context. Prefer this over a general rewrite endpoint when tone is the primary variable you want to control.

## Known failure modes

- Missing required field 'text' returns a validation error
- Missing required field 'target_tone' returns a validation error
- Unrecognized or ambiguous tone value may produce unexpected output
- Very long input text may hit token limits or increase latency
- Payment failure (insufficient USDC) blocks request processing
- Empty string input may return an error or empty result

## 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-ffb6f672/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from trempest.vercel.app](https://www.zero.xyz/host/trempest.vercel.app/llms.txt)