# Tempest AI Content Engine — Text Expand

> Tempest AI Content Engine — Text Expand is a paid API for AI agents from trempest.vercel.app, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-15).

Expands a piece of text into a longer version at a specified length target and writing style using AI generation

## Facts

- Endpoint: POST https://trempest.vercel.app/api/expand
- 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-ai-content-engine-text-expand-4c9b538c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dbOe9uliyL86kX7ActPsv

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-4c9b538c -d '<json body>'
```

Example prompt: Take this product blurb — 'Lightweight running shoes with foam soles and breathable mesh upper' — and expand it to double the length in a persuasive marketing style using Tempest.

## When to prefer this

Use this endpoint when you need to take a short piece of text and automatically expand it to a longer, richer version without manually rewriting it. Ideal for content teams scaling up short copy into full descriptions, marketers elaborating on brief product blurbs, or writers who need a first draft at a longer length. Choose this over a general rewrite endpoint when the primary goal is increasing length rather than changing tone or fixing errors.

## Known failure modes

- Missing required 'text' field returns a validation error
- Invalid target_length value (not 'double' or 'triple') may produce unexpected results or an error
- Very long input text may exceed token limits and return an error
- Payment not included or insufficient USDC balance results in a 402 payment required response
- Network timeout if the AI generation takes too long

## 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 AI-generated expanded version of the input text, elaborated to the requested length and style.

## 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-4c9b538c/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)