# Inkbox Shift Tone

> Inkbox Shift Tone is a paid API for AI agents from lastink.netlify.app, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-13).

Rewrites a piece of text to match a specified target tone (e.g. formal, casual, persuasive, empathetic)

## Facts

- Endpoint: POST https://lastink.netlify.app/api/shift-tone
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/inkbox-shift-tone-ceb9a703
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GUSaCxLsbNPUwh6YjEMMf

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 inkbox-shift-tone-ceb9a703 -d '<json body>'
```

Example prompt: Can you rewrite this paragraph in a more casual and friendly tone: 'We regret to inform you that your application was unsuccessful. We appreciate your interest in our organization and wish you success in your future endeavors.'

## When to prefer this

Use this endpoint when you need to transform existing text to a different tone without changing its core meaning — for example, adapting corporate copy to a friendly brand voice, making a casual draft more professional, or tuning customer communications for empathy. Prefer this over a full rewrite endpoint when the content structure and facts should remain intact but the emotional register needs to change.

## Known failure modes

- Missing required 'text' field returns validation error
- Missing required 'target_tone' field returns validation error
- Empty or very short text may produce low-quality output
- Ambiguous or unrecognized target_tone value may yield unexpected results
- Payment failure (402) if USDC balance is insufficient
- Rate limiting or service unavailability returns 5xx error

## How this service works

Draft, rewrite, translate, and optimize written content. 25 AI-powered endpoints. Pay-per-call with USDC on Base.

## Output

Returns a JSON object with a success boolean and a data object containing the tone-shifted version of the input text, rewritten to match the specified target tone.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text",
  "target_tone"
 ],
 "properties": {
  "text": {
   "type": "string"
  },
  "target_tone": {
   "type": "string"
  }
 }
}
```

## 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/inkbox-shift-tone-ceb9a703/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from lastink.netlify.app](https://www.zero.xyz/host/lastink.netlify.app/llms.txt)