# Inkbox AI Content Studio — Shift Tone

> Inkbox AI Content Studio — Shift Tone is a paid API for AI agents from pen-inkbox402.netlify.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. professional, casual, persuasive, empathetic).

## Facts

- Endpoint: POST https://pen-inkbox402.netlify.app/api/shift-tone
- 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/inkbox-ai-content-studio-shift-tone-3ebc04e6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yFK4pvcR-2LRgMkyiUyza

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-ai-content-studio-shift-tone-3ebc04e6 -d '<json body>'
```

Example prompt: Can you rewrite this paragraph in a more casual, friendly tone? Here's the text: 'We regret to inform you that your application has not been successful at this time. We appreciate your interest in our organization.'

## When to prefer this

Choose this endpoint when you need to adjust the emotional register or stylistic tone of existing text without changing its core meaning — e.g. making formal content casual, dry content engaging, or neutral content persuasive. Prefer this over a full rewrite endpoint when the structure and substance should be preserved but the voice needs to change.

## Known failure modes

- Missing required field 'text' — returns 400 error
- Missing required field 'target_tone' — returns 400 error
- Unrecognized or ambiguous target_tone value may produce unexpected output
- Empty or very short input text may yield poor quality results
- Payment not included or insufficient USDC — returns 402 Payment Required
- Service downtime on Netlify hosting — returns 503

## 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 while preserving the original meaning.

## 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-ai-content-studio-shift-tone-3ebc04e6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pen-inkbox402.netlify.app](https://www.zero.xyz/host/pen-inkbox402.netlify.app/llms.txt)