# Tempest AI Content Engine — Text Expand

> Tempest AI Content Engine — Text Expand is a paid API for AI agents from tumpest.vercel.app, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-14).

Expands a given piece of text to a longer version using AI, with optional style and target length control

## Facts

- Endpoint: POST https://tumpest.vercel.app/api/expand
- 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-ai-content-engine-text-expand-ff4abe08
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f0uEIlzBnrGyBmiFGCHzm

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-ai-content-engine-text-expand-ff4abe08 -d '<json body>'
```

Example prompt: Take this short paragraph and expand it to double the length in a professional writing style: 'Our product helps teams collaborate more effectively by centralizing communication and task management in one place.'

## When to prefer this

Use this endpoint when you need to programmatically lengthen a piece of text — such as turning a short draft, summary, or bullet points into a fuller document — especially when you want control over style and expansion ratio. Prefer it over general rewrite endpoints when the primary goal is increasing length and detail rather than changing tone or format.

## Known failure modes

- Missing required 'text' field returns validation error
- Invalid target_length value (not 'double' or 'triple') may cause unexpected behavior
- Payment of 0.2 USDC not sent or rejected causes 402 response
- Very long input text may cause truncation or timeout
- Vague or empty style parameter may result in generic expansion

## How this service works

Compose, rewrite, translate, and refine content at scale. 25 AI-powered endpoints. Pay-per-call with USDC on Tempo.

## Output

A JSON object containing a success boolean and a data object with the AI-generated expanded version of the input text, elaborated according to the requested style and target length.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "text": {
   "type": "string",
   "description": "Text to expand"
  },
  "style": {
   "type": "string",
   "description": "Writing style"
  },
  "target_length": {
   "type": "string",
   "description": "Target expansion (double, triple)"
  }
 }
}
```

## 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-ai-content-engine-text-expand-ff4abe08/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tumpest.vercel.app](https://www.zero.xyz/host/tumpest.vercel.app/llms.txt)